Keto Biscoff Blondies: Easy Low-Carb Recipe

There was a week last November when I was roughly two days away from losing my mind. I had been strictly keto for six months, my blood work was perfect, my energy was through the roof, but my soul? My soul was screaming for something sweet. Specifically, it was screaming for that warm, spiced, caramelized cookie butter flavor that I used to devour by the jar. You know the one. The kind you spread on everything and then argue with your partner over the last spoonful.

I tried everything. I made keto granola bars that tasted like cardboard and dried fruit. I attempted keto cheesecakes that split in the oven and made a mess I still haven’t fully cleaned off the ceiling. I even tried baking “keto cookies” that spread into thin, greasy puddles. Nothing hit the spot. Nothing came close to that dense, chewy, gooey goodness of a traditional Biscoff blondie.

Then, I got desperate. I was staring at my pantry, surrounded by almond flour, erythritol, and a jar of Biscoff spread that was mocking me, when I had a weird idea. What if I didn’t try to replicate the cookie? What if I tried to replicate the *feeling*? What if I used the Biscoff spread as the primary fat and flavor base, mixed it with a nut flour that actually holds moisture, and topped it with a keto-friendly caramel drizzle?

I baked my first batch on a rainy Tuesday. I let them cool, took a bite, and almost cried. They were dense. They were chewy. They had that distinct spiced caramel note that Biscoff is famous for, but they were low-carb, gluten-free, and keto-friendly. I ate half the pan before dinner. My husband came home, took one look at the empty pan, and asked if I had lost my mind. I told him I had finally found the holy grail.

That was three months ago. I have made this Keto Biscoff Blondies with Caramel Drizzle recipe at least ten times since then. It has become my go-to dessert when I have guests, my reward after a tough workout, and my secret weapon when the afternoon sugar crash hits. And the best part? They freeze beautifully, which means I always have a batch ready to go. If you’ve been searching for a keto dessert that doesn’t taste like “diet food,” you need to stop scrolling and start baking.

Why You’ll Love This Keto Biscoff Blondie Recipe

Look, I get it. Keto desserts have a bad reputation. We’ve all had the chalky, dry, or weirdly aftertasted treats that make us question our life choices. But this recipe is different. It’s not just “good for keto.” It’s just good. Period.

Here’s why these blondies have earned a permanent spot in my rotation:

Zero Compromise on Texture — Most keto baked goods are crumbly. These are dense and chewy, exactly like a proper blondie. I’ve tested this recipe with various nut flours, and the combination of almond flour and coconut flour creates that perfect tender-crumble structure that holds together without falling apart. They have a slight bounce to them.

Biscoff Flavor That Actually Shines — I’ve tried recipes where the Biscoff flavor gets lost under the sweetness of the erythritol. Not here. By using real Biscoff spread (yes, the sweetened kind is usually fine in moderation on keto, but I’ll give you the unsweetened option too) and adding a touch of cinnamon and ginger, the spice profile pops. It tastes like you’re eating a cookie from a high-end bakery, not a diet plan.

The Caramel Drizzle is Non-Negotiable — I know, I know. “Keto caramel?” Skeptical? I was too. But when you whisk together erythritol, butter, heavy cream, and a pinch of sea salt, it transforms into a glossy, sticky sauce that hardens slightly on the warm blondies. It adds a salty-sweet contrast that makes these blondies addictive. I’ve made these without the drizzle, and they’re good. With the drizzle? They’re life-changing.

Quick and Forgiving — You don’t need a stand mixer. You don’t need fancy equipment. You just need a bowl, a whisk, and about 15 minutes of active time. If you can melt butter and mix batter, you can make these. I’ve made them at 11 PM when I was too tired to cook, and they turned out perfect every single time.

Meal Prep Friendly — I bake a batch on Sunday, slice them into squares, and store them in the fridge. They stay fresh for a week, and they actually taste better the next day as the flavors meld. They’re perfect for lunchboxes (if your lunchbox allows treats), office snacks, or just eating straight out of the container while you wash dishes.

This is the kind of recipe that makes you forget you’re on a diet. It’s comforting, indulgent, and satisfying. It’s the dessert I crave when I want something rich and chocolate-free but equally decadent.

Ingredients You’ll Need for Perfect Keto Blondies

Before we get into the mixing, let’s talk about what goes into these blondies. I’m going to be honest with you: some of these ingredients might seem unusual if you’re new to keto baking, but they are essential for getting that chewy texture. Don’t skip them or swap them randomly, or you’ll end up with a cake or a cracker.

For the Blondie Base:

Almond Flour (2 cups / 200g) — This is your main dry ingredient. Make sure you use super-fine blanched almond flour. If you use coarse meal, the texture will be gritty. I buy mine in bulk because I use it for everything from almond crusted chicken to these blondies. It’s pricey, but it’s worth it.

Coconut Flour (2 tablespoons / 15g) — This is the secret weapon. Coconut flour is incredibly absorbent. A little bit goes a long way in soaking up the moisture from the eggs and butter, giving the blondies that dense, fudgy structure without making them dry. Do not substitute this with more almond flour, or the blondies will be too greasy.

Baking Powder (1 teaspoon) — Just a little bit to help them rise slightly. Don’t overdo it, or they’ll become too cakey.

Sea Salt (½ teaspoon) — Essential for balancing the sweetness. If you use salted butter, you might want to reduce this slightly, but I like a good pinch of salt in my keto desserts.

Erythritol or Monk Fruit Sweetener (¾ cup / 150g) — I prefer a blend of erythritol and monk fruit because it has less of a cooling aftertaste than pure erythritol. If you use pure erythritol, you might notice a slight chill when you eat them. Swerve or Lakanto are good brands. Granulated works best here; powdered sweetener will make the batter too thick.

Butter (½ cup / 115g, melted) — Use real butter. No margarine. Melt it and let it cool slightly before mixing. It adds richness and moisture.

Eggs (2 large) — Room temperature eggs mix better and create a smoother batter. Don’t skip this step; cold eggs can cause the melted butter to seize up.

Vanilla Extract (1 teaspoon) — Use pure vanilla. Artificial vanilla tastes chemical, and in a delicate keto dessert, you’ll taste it.

Biscoff Spread (½ cup / 120g) — This is the star. I use Lotus Biscoff Spread. It’s sweetened, but the carb count is manageable in this context. If you want to be stricter, you can use unsweetened almond butter mixed with a teaspoon of cinnamon and a drop of liquid stevia, but the flavor won’t be the same. I’m not judging. I’m just telling you the truth.

Spices (1 teaspoon cinnamon, ¼ teaspoon ginger) — Biscoff has those warm spices in it, so adding extra cinnamon and a hint of ginger amplifies that flavor profile. Don’t skip the ginger; it adds a subtle kick that makes the dessert feel sophisticated.

For the Keto Caramel Drizzle:

Heavy Cream (¼ cup / 60ml) — Full fat only. This creates the creamy texture of the caramel.

Butter (2 tablespoons) — Adds richness and helps emulsify the sauce.

Erythritol or Monk Fruit (¼ cup / 50g) — You’ll need to melt this down to create the caramel base. It might take a minute, so be patient.

Salt (Pinch) — Essential for making it taste like caramel.

Optional: Biscoff Crumble — Crush up a few keto-friendly Biscoff cookies (or just use a tiny bit more spread) to sprinkle on top for extra texture.

Equipment Needed

You don’t need much for this recipe. Keep it simple.

8×8 Inch Baking Pan — I use a glass pan because it bakes evenly, but a metal pan works too. Line it with parchment paper, leaving an overhang on the sides. This is crucial for lifting the blondies out once they cool so you can slice them cleanly.

Mixing Bowls — Two bowls. One for dry ingredients, one for wet. I use medium-sized ceramic bowls because they don’t slip around.

Whisk — A simple wire whisk is all you need to combine the batter smoothly.

Saucepan — Small, for making the caramel drizzle. Non-stick is nice, but stainless steel works fine. Just keep an eye on it so it doesn’t burn.

Spatula — A silicone spatula is great for scraping the bowl and folding in the Biscoff spread.

Wire Rack — Let the blondies cool on a rack so air circulates underneath. If you leave them in the hot pan, they’ll keep cooking and might get dry.

How to Make Keto Biscoff Blondies: Step-by-Step

Alright, let’s get baking. This is straightforward, but there are a few tricks to ensure they turn out chewy, not cakey.

Step 1: Prep Your Pan and Oven

Preheat your oven to 350°F (175°C). Line your 8×8 inch baking pan with parchment paper. Leave a little overhang on the long sides—this is your handle for lifting the blondies out later. Spray it lightly with cooking spray just to be safe.

Step 2: Mix the Dry Ingredients

In a medium bowl, whisk together the almond flour, coconut flour, baking powder, sea salt, cinnamon, and ginger. Make sure there are no lumps in the almond flour. If you see big chunks, give it a quick pulse in a food processor or sift it. This ensures an even texture.

Step 3: Combine the Wet Ingredients

In a separate large bowl, whisk the melted butter, eggs, vanilla extract, and sweetener until well combined. The mixture should look smooth and slightly frothy. This helps distribute the sweetness evenly.

Step 4: Bring It All Together

Pour the wet ingredients into the dry ingredients. Stir with a spatula until just combined. The batter will be thick and sticky—this is normal. If it’s too dry to mix, add a tablespoon of heavy cream or milk. If it’s too wet, add a tablespoon more almond flour.

Step 5: Fold in the Biscoff

Here’s the fun part. Take your ½ cup of Biscoff spread and dollop it into the batter. Don’t fully mix it in! Use your spatula to fold it through gently, leaving swirls and pockets of spread throughout. This creates those gooey, flavorful bites that make these blondies special. If you mix it completely, you lose the marbled effect.

Step 6: Bake

Spread the batter evenly into your prepared pan. Bake for 20-25 minutes. The edges should be golden brown, and the center should be set but still slightly jiggly. Do not overbake! Keto baked goods continue to cook as they cool. If you wait until the center is completely firm, they will be dry. I usually take them out at 22 minutes.

Step 7: Make the Caramel Drizzle

While the blondies cool, make the sauce. In a small saucepan over medium heat, combine the heavy cream, butter, and sweetener. Whisk constantly. It will bubble and thicken. Once it starts to thicken (about 3-4 minutes), remove from heat and stir in the salt. Let it cool for 5 minutes—it will thicken more as it cools.

Step 8: Assemble and Slice

Lift the cooled blondies out of the pan using the parchment paper. Drizzle the caramel sauce over the top. Let it set for 10 minutes, then slice into squares. I cut mine into 9 large squares, but you can do 12 smaller ones if you’re watching portions closely.

Expert Tips for Chewy, Perfect Blondies

I’ve made these enough times to know what goes wrong and how to fix it. Here are my hard-earned lessons.

Don’t Overmix the Batter — Once you add the flour, mix just until you don’t see dry streaks. Overmixing develops the protein in the almond flour, which can make the blondies tough. You want tender, not chewy in a bad way.

Measure Your Coconut Flour Carefully — Coconut flour is a sponge. If you pack it into the cup, you’ll add too much, and your blondies will be dry. Spoon it into the measuring cup and level it off. 2 tablespoons is a small amount, so don’t eyeball it.

Let Them Cool Completely — I know, I know. You want to eat them now. But keto baked goods are fragile when hot. If you cut them immediately, they’ll fall apart. Let them cool in the pan for at least 20 minutes, then transfer to a wire rack. They firm up as they cool.

Store Properly — These blondies are best stored in an airtight container in the fridge. They keep for up to 5 days. If you live in a hot climate, the fridge is essential to keep the Biscoff spread from melting into the batter.

Freezing Works Wonders — I freeze these blondies individually wrapped in plastic wrap. When I want a treat, I just take one out and let it thaw on the counter for 10 minutes. The texture actually improves after freezing because the moisture redistributes.

Watch the Oven — Every oven is different. My oven runs hot, so I check at 20 minutes. If the edges are browning too fast, cover the top with foil. You want a golden top, not a burnt one.

Variations and Substitutions

Once you’ve mastered the basic version, here are some ways to mix it up. I’ve tried all of these, and they all work.

Chocolate Chip Biscoff — Add ½ cup of sugar-free chocolate chips (like Lily’s or ChocZero) to the batter along with the Biscoff swirls. The chocolate and caramel flavors are a dream team.

White Chocolate Biscoff — Use sugar-free white chocolate chips instead of regular chocolate. This makes it even more indulgent and closer to a classic blondie vibe.

Walnut or Pecan Crunch — Fold in ½ cup of chopped toasted walnuts or pecans. The nuttiness pairs beautifully with the Biscoff spices. I toast the nuts in a dry pan for 2 minutes before adding them for extra flavor.

Unsweetened Biscoff Version — If you’re strictly tracking carbs and want to avoid the sugar in Biscoff spread, use ½ cup of unsweetened almond butter mixed with 1 teaspoon of cinnamon, ¼ teaspoon of ginger, and a few drops of liquid stevia. It’s less sweet, but the spice flavor is still there.

Gluten-Free Note — This recipe is naturally gluten-free, as long as you use certified gluten-free almond flour and baking powder. Always check your labels if you have celiac disease.

Dairy-Free Option — Substitute the butter with coconut oil and the heavy cream with full-fat coconut cream. The flavor will be slightly coconutty, but it still works. Just make sure your Biscoff spread is dairy-free if you’re avoiding all dairy (most Biscoff contains butter, so check the label).

Serving and Storage

I usually serve these blondies with a cup of hot coffee or tea. The bitterness of the coffee cuts through the sweetness of the caramel perfectly. I also like to serve them with a dollop of sugar-free whipped cream on top for a fancy touch.

Refrigerator: Store in an airtight container for up to 5 days. They taste best cold or at room temperature.

Freezer: Wrap individual squares in plastic wrap and place them in a freezer-safe bag. They last up to 3 months. Thaw on the counter for 10 minutes before eating.

Reheating: If you like them warm, microwave a square for 10-15 seconds. The Biscoff spread will get gooey, and the caramel will soften. It’s like eating a warm cookie fresh from the oven.

Pro Tip: If you’re meal prepping, cut them into smaller squares. It’s easier to control portions, and you’re less likely to eat the whole batch in one sitting.

Nutrition Information

I’m not a nutritionist, but here’s the breakdown based on my calculations. Please note that nutritional values can vary depending on the specific brands of ingredients you use, especially sweeteners and nut flours.

Per Serving (1 of 9 blondies):

Calories: 280

Total Fat: 24g

Net Carbs: 4g

Total Carbs: 9g

Fiber: 5g

Protein: 7g

Sugar: 2g

What’s Good: High in healthy fats from almonds and Biscoff. Good fiber content from the almond and coconut flour. Low in net carbs, making it keto-friendly.

What to Know: High in calories due to the nut flour and spread. If you’re counting calories, keep an eye on portion sizes. One square is a satisfying treat, but two might be too many if you’re strict.

My Take: This is a rich, indulgent dessert. It’s not a snack you eat by the handful. It’s a “sit down, enjoy a square, drink some coffee” treat. And that’s exactly how it should be.

Final Thoughts

So, that’s my go-to Keto Biscoff Blondies with Caramel Drizzle. I’ve probably talked your ear off at this point, but when you find a recipe that finally makes you feel like you’re not missing out on keto, you want to share it. These blondies have saved me during those tough sweet-tooth moments. They’re chewy, spicy, caramel-y, and completely satisfying.

Make them your own! Add chocolate chips, nuts, or different spices. The base recipe is flexible, so experiment until you find your perfect combination. And if you make them, I’d love to hear how they turn out. Drop a comment below with your thoughts or any variations you tried. I read every single comment and love hearing about your kitchen adventures.

Happy baking! And I hope your kitchen smells as amazing as mine does right now.

Frequently Asked Questions

Can I use cashew flour instead of almond flour?

You can, but the texture will be slightly different. Cashew flour is finer and oilier, so your blondies might be denser and more cake-like. I prefer almond flour for that specific chewy texture, but cashew flour works in a pinch. Just reduce the amount of liquid slightly if the batter seems too wet.

Why did my blondies turn out dry?

This usually happens if you overbake them or use too much coconut flour. Remember, keto baked goods continue to cook as they cool. Take them out when the center is still slightly jiggly. Also, double-check your coconut flour measurement—be sure to spoon and level it, not pack it.

Can I freeze the caramel drizzle?

The caramel drizzle is best made fresh. If you try to freeze it, it might separate or become grainy when thawed. I recommend making the caramel just before you’re ready to serve or store the blondies. If you have leftover caramel, store it in the fridge for up to 3 days and reheat gently on the stove.

Is Biscoff spread keto-friendly?

Traditional Lotus Biscoff spread contains sugar, so it’s not strictly keto in large quantities. However, in this recipe, the amount used is small enough that the net carb count per serving remains low (around 4g). If you want to be stricter, use unsweetened almond butter with added spices, but the flavor will be different. I find the traditional spread worth the few extra carbs for the taste.

Can I make these in a muffin tin?

Yes! Divide the batter into a greased muffin tin. Bake for 15-18 minutes. Keep an eye on them because they bake faster in muffin tins. These make great individual portions and are perfect for packing in lunchboxes.

What sweetener do you recommend?

I use a blend of erythritol and monk fruit (like Lakanto or Swerve Blend) because it has no aftertaste and measures cup-for-cup like sugar. Pure erythritol can have a cooling effect, and pure monk fruit is often too potent. A blend gives the best result for baking.

Can I double this recipe?

Absolutely. Just use a 9×13 inch baking pan and increase the baking time by 5-10 minutes. Check for doneness with a toothpick. The ratios remain the same, so it’s a simple doubling of ingredients.

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