Name: Biscoff Blondies
Prep time: 15 min
Cook time: 30 min
Total time: 45 min
Cuisine: American
Ingredients: 115g unsalted butter, melted; 130g Biscoff cookie butter; 150g brown sugar; 50g white granulated sugar; 1 large egg; 1 egg yolk; 1 tsp vanilla extract; 130g all-purpose flour; 1/2 tsp baking powder; 1/4 tsp salt; 100g chopped white chocolate or crushed Biscoff cookies

Craving something irresistibly chewy, buttery, and spiced with that deep caramel flavor only Biscoff can deliver? These Biscoff Blondies are the ultimate treat for cookie butter lovers. Each bite is packed with a gooey center, crisp golden edges, and rich notes of brown sugar and cinnamon that make them downright addictive.

What makes these blondies stand out is the combination of cookie butter and chunks of white chocolate or Biscoff cookies folded right into the batter. They’re easy to whip up and hard to put down — perfect for gatherings, gifting, or when you just need a cozy dessert to end your day.

Preparation Phase & Tools to Use

Before diving into making these delicious bars, having the right tools on hand will save you time and ensure perfect results:

Mixing Bowls (Medium and Large): You’ll need at least two bowls for mixing the dry and wet ingredients separately. A large one helps when folding in the cookie chunks.
Whisk and Silicone Spatula: A whisk helps blend wet ingredients evenly, while a spatula is great for scraping down the sides and folding gently.
8×8-inch Baking Pan: This is the ideal size for thick, bakery-style blondies. If you prefer thinner bars, a 9×9 pan also works.
Parchment Paper: Essential for an easy lift from the pan and cleaner edges when cutting.
Electric Mixer (optional): Speeds up creaming the butter and sugar if you want extra fluff in your blondies.

With just a few quality tools and the right prep, your Biscoff Blondies will come together effortlessly.

Ingredients for the Biscoff Blondies

Each ingredient in these blondies plays a role in creating that signature chewy, gooey, Biscoff-loaded texture and taste:

Unsalted Butter: Adds richness and moisture. Melting it gives the blondies a soft, dense crumb.
Biscoff Cookie Butter: The star ingredient. Its spiced, caramel flavor infuses every bite.
Brown Sugar: Brings a deep molasses flavor and contributes to the chewiness.
White Granulated Sugar: Balances the richness with sweetness and helps with structure.
Egg + Egg Yolk: The extra yolk boosts moisture and adds that soft-bite texture.
Vanilla Extract: Rounds out the sweetness with a warm aroma.
All-Purpose Flour: Provides the structure. Not too much to keep the blondies fudgy.
Salt: Balances the sweet and enhances flavor.
Baking Powder: A touch of lift for soft thickness.
Chopped White Chocolate or Biscoff Cookies: Adds texture and pockets of melty or crunchy surprise.

How To Make the Biscoff Blondies

Step 1: Melt and Mix the Base

Melt the butter in a saucepan or microwave. Stir in the Biscoff spread while the butter is still warm to create a smooth, creamy base.

Step 2: Combine Wet Ingredients

Whisk together brown sugar, granulated sugar, the whole egg, and extra yolk until light and glossy. Add in vanilla extract, then pour in the melted Biscoff-butter mixture and whisk again.

Step 3: Fold in the Dry Mix

In a separate bowl, whisk together the flour, baking powder, and salt. Gently fold the dry mix into the wet mixture with a spatula until just combined.

Step 4: Add Mix-ins

Fold in chopped white chocolate or Biscoff cookie chunks evenly throughout the batter. This step ensures each bite gets a burst of flavor or crunch.

Step 5: Bake to Perfection

Preheat oven to 350°F (175°C). Line your 8×8 pan with parchment paper and pour in the batter. Smooth the top and bake for 25–30 minutes until the edges are set and the center is soft but not jiggly.

Step 6: Cool and Slice

Let them cool in the pan completely before slicing. For cleaner cuts, chill them slightly. Drizzle with melted Biscoff on top if you like an extra flourish.

How to Serve and Store Biscoff Blondies

Serve Biscoff Blondies slightly warm for the most indulgent texture—the white chocolate softens, and the cookie butter becomes fragrant and gooey. Pair with a scoop of vanilla bean ice cream or a drizzle of warm caramel sauce if you’re going all out.

They also hold up beautifully at room temperature, making them perfect for lunchboxes, dessert trays, or quick grab-and-go treats. For extra flair, add a drizzle of melted Biscoff or dust with powdered sugar right before serving.

To store, keep blondies in an airtight container at room temperature for up to 4 days. They stay soft and moist! For longer storage, refrigerate them for up to a week or freeze individually wrapped squares for up to 2 months. Thaw and reheat gently in the microwave for a fresh-from-the-oven feel.

Frequently Asked Questions

Can I use crunchy Biscoff spread instead of smooth?

Absolutely. Crunchy Biscoff adds a bit more texture and cookie bits throughout the blondies, which many people enjoy!

Can I double the recipe?

Yes! Use a 9×13-inch baking pan and keep an eye on the baking time. You may need to add 5–10 extra minutes depending on your oven.

How do I know when they’re done baking?

The edges will look golden and set, while the center should be soft but no longer jiggly. A toothpick inserted in the center should come out with moist crumbs, not wet batter.

What can I use instead of white chocolate?

Chopped Biscoff cookies, milk chocolate chunks, or even toffee bits make great mix-in alternatives.

Can I make them gluten-free?

Yes, use a 1:1 gluten-free flour blend designed for baking. Make sure all other ingredients (like cookie butter and mix-ins) are also gluten-free certified.

Do they need to be refrigerated?

Not at all. They store well at room temperature, but refrigeration can help them last longer or make them easier to slice for clean presentation.

Want More Blondie and Dessert Bar Ideas?

If these Biscoff Blondies hit the spot, you’ll definitely want to try more easy tray bakes and decadent bar-style desserts from LadyPlate. For another melt-in-your-mouth treat, check out the No Bake Banana Pudding Cheesecake—it’s creamy, chilled, and a complete crowd-pleaser.

Craving a cinnamon twist? The Cinnamon Donut Bread brings the same warm spice profile as Biscoff, but in a fluffy loaf form. For a fruity edge, go for the Raspberry Crescent Rolls—soft, flaky, and easy to share.

If you enjoy a touch of elegance, the Elegant Lemon Marbled Cheesecake Bars offer a refined, zesty finish. And don’t miss the Mini Cinnamon Roll Cheesecakes for portion-perfect swirls of spiced sweetness.

Pin and Tell Me How Yours Turned Out

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If you make it, I’d love to hear how it turned out. Did you add a swirl? Did you use crunchy or smooth Biscoff? Leave a comment below. I’m always curious how others bake it.

For more ideas like this, visit my Pinterest where I share new sweet bakes daily: LadyPlate on Pinterest.