Decadent Biscoff Blondie Bars

The Magic of Biscoff Blondies

Blondies, often considered the vanilla counterpart to rich brownies, offer a delightful chewiness and a depth of flavor that can be incredibly versatile. In this recipe, we elevate the classic blondie by infusing it with the beloved taste of Lotus Biscoff. Originating from Belgium, Biscoff cookies (also known as speculoos) are renowned for their distinctive spiced caramel flavor, a unique blend of cinnamon, ginger, nutmeg, and cloves. This warm, inviting spice profile, combined with the buttery richness of a blondie, creates a truly unforgettable dessert that stands out from the crowd.

These Biscoff blondies are not just a treat for the taste buds; they are a celebration of simplicity in baking. Designed for ease and maximum flavor, they come together quickly and require minimal fuss, making them perfect for last-minute cravings or an impressive dessert for guests. The contrast between the soft, fudgy interior and the subtle crispness of the Biscoff cookie pieces creates a textural experience that is utterly divine. Get ready to discover your new favorite way to enjoy the classic Biscoff taste!

Essential Ingredients for Biscoff Blondies

Crafting these delectable Lotus Biscoff blondies requires just a handful of straightforward ingredients, each playing a crucial role in achieving that perfect fudgy texture and signature spiced caramel flavor.

For precise quantities and detailed instructions, please refer to the complete recipe card provided further down the page.

• Lotus Biscoff Cookies: You’ll need exactly 12 of these iconic cookies to infuse your blondies with that unmistakable speculoos crunch and flavor. If true Lotus Biscoff cookies are unavailable, seek out other speculoos biscuits or any plain spiced cookie that offers a similar cinnamon, ginger, and nutmeg profile. Their distinctive crunch contributes wonderfully to the blondie’s texture.
• Lotus Biscoff Spread: This is the star ingredient that delivers a concentrated punch of creamy, spiced caramel goodness. While Lotus Biscoff spread is highly recommended for an authentic taste, other brands of cookie butter can also be used as a suitable alternative if necessary. This spread is essential for the blondies’ rich, fudgy consistency and deep Biscoff essence.
• Unsalted Butter: Using unsalted butter allows you complete control over the salt content in your baking. If you only have salted butter on hand, simply omit the additional salt listed in the recipe. Butter contributes to the rich flavor and the moist, tender crumb of the blondies.
• White Chocolate: A small amount of melted white chocolate is key to achieving that perfectly fudgy, chewy texture without imparting a dominant white chocolate flavor. Unlike many recipes that feature chocolate chips, we opt for melted white chocolate to enhance the blondie’s structure and chewiness, ensuring the Biscoff flavor remains the hero.
• Granulated Sugar & Light Brown Sugar: This recipe calls for a combination of both sugars. Granulated sugar provides classic sweetness and helps create that desirable slightly crisp, crackly top on your blondies. Light brown sugar, on the other hand, adds essential moisture, promoting a chewier texture and contributing a subtle, underlying caramel note that complements the Biscoff beautifully.
• Large Eggs: Free-range eggs, ideally at room temperature, are used as a binder and contribute to the rich structure of the blondies. Room temperature eggs emulsify better with the other ingredients, leading to a smoother batter and a more uniform bake.
• Plain Flour / All-Purpose Flour: Simple plain (all-purpose) flour is all you need for this recipe. It provides the necessary structure without being overly heavy. Measuring correctly is key for texture.
• Baking Powder: Ensure you use baking powder, not baking soda, as it provides the perfect amount of lift for a tender, not dense, blondie. It creates a soft interior without making them cake-like.
• Salt: Just a quarter teaspoon of salt is enough to enhance and balance all the sweet and spiced flavors, making every bite more complex and satisfying. It brings out the best in all the other ingredients.

Step-by-Step Guide to Making Perfect Biscoff Blondies

Creating these delightful Biscoff blondies is a straightforward process that yields incredibly delicious results. Follow these simple steps for blondie perfection.

For precise quantities and detailed instructions, please refer to the complete recipe card provided further down the page.

1. Prepare Your Pan and Oven: Begin by preheating your oven to 180°C / 350°F (160°C fan forced). Line an 8×8 inch square baking pan with baking paper, ensuring there’s an overhang on two sides to easily lift the blondies out later. This crucial step prevents sticking and makes removal a breeze.
2. Melt Butter and Chocolate: In a large, microwave-safe bowl, combine the unsalted butter and white chocolate. Gently melt them together. If using a microwave, heat in short 30-second bursts, stirring thoroughly after each interval to prevent overheating and scorching the chocolate. Alternatively, you can use a double boiler method: place the bowl over a saucepan of simmering water, ensuring the bowl does not touch the water, and stir until smooth. This creates a smooth, foundational mixture for your blondies.
3. Combine Sugars and Wet Ingredients: Once the butter and chocolate are melted and smooth, add both the granulated sugar and light brown sugar to the bowl. Whisk vigorously until the sugars are fully incorporated and the mixture is well combined. This initial whisking helps to dissolve some of the sugar, contributing to that desirable flaky top. Next, add the large eggs (ideally at room temperature for better emulsification) and the majority of the Biscoff spread (remember to reserve 1 tablespoon for drizzling later). Continue whisking until the mixture is completely smooth and luscious.
4. Incorporate Dry Ingredients: Carefully add the plain flour, baking powder, and a pinch of salt directly to the wet mixture in the bowl. Using a balloon whisk, gently mix the ingredients together just until no streaks of dry flour remain and the batter is smooth. It’s incredibly important to **avoid overmixing** at this stage, as over-developing the gluten can lead to tough, dry blondies instead of the desired fudgy texture.
5. Assemble and Bake: Take 6 of your Lotus Biscoff cookies and roughly break them into smaller pieces. Scatter these broken cookies evenly across the bottom of your prepared baking pan. Pour the entire blondie batter over the cookie base, gently spreading it out with a silicone spatula to ensure an even layer. Take the remaining 6 Biscoff cookies, break them in half, and arrange them artfully over the top of the batter. Place the pan in your preheated oven and bake for approximately 35 minutes. The blondies are done when the top appears dry and golden brown, and the center no longer jiggles when gently shaken.
6. Cool and Drizzle: Once baked, remove the blondies from the oven and allow them to cool completely in the tin for at least 20 minutes before attempting to remove them. This cooling period is crucial as it allows the butter and chocolate to re-set, firming up the blondies and ensuring they achieve their ultimate fudgy texture. After initial cooling, transfer the blondie slab to a wire rack to cool for another 10-15 minutes. Finally, warm your reserved tablespoon of Biscoff spread in the microwave for a few seconds until pourable, then drizzle it enticingly over the cooled blondies. Allow them to set completely before slicing into squares.

Creative Variations and Substitutions

While these Lotus Biscoff blondies are perfect as is, feel free to get creative and adapt the recipe to your preferences or what you have on hand. Don’t let a lack of Biscoff products stop you from enjoying a delicious blondie!

If Lotus Biscoff products are difficult to find in your area, this versatile recipe easily accommodates some fantastic swaps. You can confidently substitute the Biscoff cookie butter with an equal amount of creamy **peanut butter** for a rich, nutty blondie, or indulge in a decadent **Nutella** version for a hazelnut chocolate twist. For the Lotus Biscoff biscuits, simply use any plain chocolate cookie or even plain digestive biscuits as a crunchy base and topping.

Beyond substitutions, consider these exciting variations to further customize your blondies:

• White Chocolate Chip Bliss: While the recipe omits chocolate chips to highlight Biscoff, a handful of white chocolate chips folded into the batter can add pockets of creamy sweetness.
• Nutty Crunch: Add chopped pecans, walnuts, or even macadamia nuts to the batter for an extra layer of texture and flavor.
• Spice it Up: Enhance the warm spice profile by adding a pinch of extra cinnamon, a touch of cardamom, or a tiny dash of cayenne pepper for a subtle kick.
• Swirls of Delight: Before baking, dollop extra warmed Biscoff spread (or another spread like Nutella) on top of the batter and swirl it gently with a knife for a beautiful marbled effect.
• Candy Crunch: Crumble your favorite candy bars (like Twix, Snickers, or even Heath bars) and fold them into the batter for an indulgent treat.

Serving and Storage Suggestions

This Biscoff blondie recipe is generously sized, yielding approximately 9 substantial slices or 16 more modestly sized portions. While these blondies are perfectly balanced in sweetness, their decadent nature means that a smaller slice often satisfies, though we completely understand if you find yourself reaching for a second – it’s practically irresistible!

For the best eating experience, these blondies are truly delightful when served slightly warm, perhaps with a scoop of vanilla ice cream, or at room temperature. The subtle warmth enhances the caramel and spice notes, making each bite even more comforting.

To keep your Biscoff blondies fresh and delicious, store them in an airtight container. They will maintain their quality for 3-4 days at room temperature. If you wish to extend their freshness, they can be stored in the refrigerator for up to a week. However, experience tells us they rarely last that long! For optimal flavor and texture, allow refrigerated blondies to come to room temperature for about 15-20 minutes before serving. To further prolong their moistness, only cut the portions you plan to serve immediately, leaving the rest of the slab intact until needed.

More Baking Adventures You’ll Adore

If you’ve fallen in love with these Biscoff blondies, prepare to expand your baking repertoire with more delightful recipes that promise indulgence and ease:

• Biscoff Brownies: For those who love the rich chocolate of brownies paired with the spiced caramel of Biscoff.
• Biscoff Mug Cake: A quick and easy single-serving dessert for instant Biscoff satisfaction.
• Biscoff Ice Cream: A creamy, dreamy no-churn ice cream bursting with cookie butter flavor.
• Macadamia Caramel Blondies: A sophisticated twist with crunchy nuts and gooey caramel.
• Brownie Blondies: The best of both worlds – chocolatey brownies and buttery blondies in one.
• Oreo Blondies: A classic combination for cookies and cream lovers.
• White Chocolate Malted Milk Blondies: A unique flavor profile with the comforting taste of malt.
• Gingerbread Blondies: Perfect for the holiday season or any time you crave warm spices.

Fudgy Lotus Biscoff Blondies

Yield: 16 blondies

Prep Time: 10 minutes minutes

Cook Time: 35 minutes minutes

0 minutes minutes

Total Time: 45 minutes minutes

4.8 from 16 ratings

These incredibly quick and easy Biscoff blondies are wonderfully fudgy, crafted in a single bowl, and bursting with that classic speculoos cookie flavor. Made with both Lotus Biscoff cookies and creamy spread, they deliver a delightful punch of warm, spiced caramel in every bite.

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Ingredients

• 12 Lotus Biscoff cookies
• 113 g unsalted butter (½ cup / 1 stick)
• 50 g white chocolate (1.8oz)
• ½ cup granulated sugar (100g / 3.5oz)
• ½ cup, packed light brown sugar (100g / 3.5oz)
• ¾ cup Lotus Biscoff spread (~170g/6oz)
• 2 large eggs, room temp
• ¾ cup plain flour (all-purpose flour) (95g / oz)
• ¼ teaspoon baking powder
• ¼ teaspoon table salt

For best results, always weigh ingredients where a weight is provided

Equipment

• Large mixing bowl
• Balloon whisk and silicone spatula
• 8×8 inch square baking pan

Instructions

 

• Preheat your oven to 180C / 350F / 160C fan forced. Line an 8×8 inch square baking tin with baking paper, leaving an overhang on two sides for easy removal.
• Roughly break up 6 of the Biscoff biscuits and scatter them evenly in the base of the prepared baking pan. Set aside.
• In a large mixing bowl, melt the butter and white chocolate together. This can be done in the microwave (in 30-second increments, stirring very well between each) or over a pot of simmering water (using a bowl that doesn’t touch the water).
• Add both granulated and light brown sugars to the melted butter and chocolate mixture. Whisk vigorously until thoroughly combined and smooth.
• Reserve 1 tablespoon of Biscoff spread for drizzling later, then add the remaining Biscoff spread to the bowl along with the 2 large eggs. Whisk all the wet ingredients together until the mixture is completely smooth and well-emulsified.
• Add the plain flour, baking powder, and table salt to the wet mixture. Mix gently with a whisk or spatula just until the batter comes together and no dry streaks of flour are visible. Be careful not to overmix.
• Pour the blondie batter evenly over the broken Biscoff cookies in the prepared pan. Break the remaining 6 cookies in half and arrange them decoratively over the top of the batter.
• Bake for approximately 35 minutes, or until the top is golden brown and appears dry, and the center no longer jiggles when the pan is gently shaken. Avoid overbaking to maintain fudginess.
• Allow the blondies to cool in the baking tin for at least 20 minutes before carefully lifting them out using the parchment paper overhang. Transfer the blondie slab to a wire rack to cool for another 10-15 minutes, or until almost completely cooled.
• Warm the reserved tablespoon of Biscoff spread in the microwave for a few seconds until it’s a pourable consistency. Drizzle this warmed spread artistically over the cooled blondies.
• For the cleanest cuts and the best fudgy texture, allow the blondies to cool completely at room temperature before slicing and serving. They are best enjoyed slightly warm or at room temperature.
• We would love to hear from you! Please take a moment to leave a comment & rating on this recipe. Your feedback is greatly appreciated and helps others discover these delicious blondies.

Notes

1. Oven Variances: All ovens can differ slightly in temperature. Your blondies may require a little more or less time than suggested. Always start checking for doneness 3-5 minutes before the recipe’s recommended bake time to prevent overbaking.
2. Accurate Measurement with Scales: For consistently perfect results, especially when measuring flour and sugar, it is highly recommended to use a digital kitchen scale. These are an affordable investment that significantly improves baking accuracy. If you do not have a scale, use the “spoon and level” method for flour: spoon the flour into your measuring cup until overflowing, then level it off with the back of a knife. Avoid scooping directly with the cup, as this compacts the flour and can lead to too much being used.

EXPLORE MORE FUDGY BLONDIES AND BROWNIES!

Calories: 245kcal

Author: Marie Roffey

Course: Dessert

Cuisine: American

Have you tried this recipe?Don’t forget to leave a rating and comment below and let me know how it was! I love hearing from you. Nutrition information is approximate and derived from an online calculator. The brands you use may cause variations.