These quick and easy Biscoff blondies are thick, chewy, irresistible, and made in one bowl! Also referred to as speculoos or cookie butter, these cookie butter blondies are packed with warm spices, caramel notes and topped with crunchy Lotus cookies.
Why You'll Love This Recipe
I'm telling you these are the best blondies! They're so quick, easy, and everyone will demolish them. Be sure to drizzle the tops with melted Biscoff spread for extra cookie butter flavor.
Flavor and texture - biting into one of these speuloos blondies yields an incredibly chewy, fudgy texture with a buttery, warm spiced, caramelized finish.
One bowl recipe - this Biscoff blondies recipe is made completely by hand in one large mixing bowl! It doesn't get easier than that, and will be on your table in less than an hour.
What is Biscoff?
If you've ever been on an airplane, chances are you've had a biscoff cookie. You may not have known what it was (besides delicious) but they are typically served with coffee or tea. These cookies are extra crispy, but full of warm spices and caramel flavor and are one of the best cookies to have ever lived.
Now, talking verbiage - are biscoff & speculoos the same thing?
Biscoff is the type of cookie that "cookie butter" is made of, and is known as biscoff from its Belgian roots. You'll find them under the Lotus brand in most U.S. grocery stores. The word speculoos (or speculaas) is how the cookie is referred to in the Netherlands and some other European countries.
This particular cookie is broken down and pulverized to create cookie butter, which is how the name came about. It has a peanut butter like consistency and Lotus or Trader Joes brands are the ones you'll find most in the U.S.
However, you'll also see it labeled as biscoff spread or speculoos spread. Whew! Did you get all of that?
- Cookie butter. The star of the show and main flavor component. Feel free to use creamy or crunchy. Look for this as Lotus brand, or at Trader Joe's under their brand.
- Biscoff cookies. The addition of cookies added to the top adds a nice bit of extra texture to the bars, but this is optional! These are found under the Lotus brand.
- Unsalted butter. Melted and incorporated into the batter.
- Brown sugar. I prefer to use dark brown sugar for a better depth of flavor, but light brown sugar can be used.
- Eggs. One full egg and one extra yolk. The additional yolk makes these extra rich and fudgy.
- All-purpose flour. Be sure to measure this correctly - using a scale is best. Adding too much flour will result in cakey blondies rather than gooey and chewy blondies.
- Ground cinnamon. For just a touch more warmth!
How to Make This Recipe
Preheat the oven to 350℉/180℃ and line an 8x8" baking dish with parchment paper. Watch my Parchment Paper Tricks video for best practices!
One: Add the melted butter, cookie butter, and brown sugar to a large bowl.
Two: Whisk vigorously to combine.
Three: Add the eggs and vanilla extract.
Four: Whisk vigorously until very smooth.
Five: Add the flour, cinnamon, and salt and fold them together with a rubber spatula, scraping down the sides.
Six: Continue folding until all flour and dry ingredients disappear and a thick batter forms.
Seven: Add the batter to a prepared pan.
Eight: Use your hands to press the Biscoff blondie batter into the pan, being sure to get the whole way to the edges.
Nine: Add crushed Biscoff cookies to the top, then bake.
Ten: Allow the bars to cool in the pan for about 15 minutes, then use the parchment paper slings to remove and cut the bars.
Hot tip! Heat ¼ cup of additional cookie butter and drizzle it over the top for extra flavor!
- Measure the flour correctly! Adding too much will result in a cakey blondie rather than a chewy, fudgy version.
- This batter is very thick - it's easiest to use clean hands and fingers to press the dough into the pan.
- Don't over bake the blondies! They should not need more than 30 minutes in a correctly heated oven. The batter is very thick so it may be difficult to tell when they are done. The edges will look totally set.
- Gently reheat the blondies before eating leftovers. When slightly cool or from the fridge, they can become too hard. Microwave individual slices for a few seconds, or bake the rest of the pan for about 5 minutes at 350℉/180℃.
Substitutions and Variations
There's a few ways you can spice up your Biscoff blondies, though I really love them as is!
- Add ½ cup chopped white chocolate or white chocolate chips to the batter.
- Add ½ cup to the top of the batter and swirl it in. This will take a bit of work - a chopstick is a great tool for this.
- Swirl ½ cup of caramel into the batter (same as above). If you want to make your own, follow my no thermometer caramel video recipe!
Storing and Freezing
Store the biscoff blondies at room temperature for 3 days, or in the fridge for 5. Gently reheat the bar(s) in the microwave or in a 350℉/180℃ oven for about 5 minutes.
To freeze the cookie butter blondies, wrap tightly in plastic wrap, then aluminum foil, and place in a tiptop bag. Store for one month.
Unwrap completely and thaw at room temperature before gently reheating.
FAQs & Tips
Brownies are made with cocoa powder and sometimes melted chocolate, while blondies are made without cocoa powder, and sometimes uses melted white chocolate. Blondies are light in colors, and brownies are brown in color!
You certainly can, though it's not necessary if the biscoff blondies are being eaten within three days.
If storing in the fridge, they will dry out more quickly, so you'll definitely want to reheat them in the oven (or on a plate in the microwave) to revive the chewy goodness!
The blondies are baked when the edges are totally set and slightly pull away at the very tops or sides. The center may look slightly darker than the sides or edges, which is normal.
More Dessert Bar Recipes
- 8x8 inch pan
- Mixing bowls
- Rubber spatula
- ½ cup unsalted butter melted (113g)
- ⅔ cup cookie butter melted/warmed (200g)
- 1 cup brown sugar* 200g
- 1 large egg
- 1 egg yolk
- 2 teaspoons vanilla paste or extract
- 1⅔ cup all-purpose flour 200g
- ½ teaspoon ground cinnamon
- ½ teaspoon kosher salt
- Biscoff cookies optional
- Preheat the oven to 350℉/180℃ and line an 8x8" pan with parchment paper.
- In a large bowl, add the melted butter, melted cookie butter and brown sugar and whisk vigorously to combine.
- Add the egg, egg yolk and vanilla and whisk again.
- Sprinkle over the flour, cinnamon and salt and use a rubber spatula to fold and mix the batter together until all flour disappears.
- Press the batter into the pan using a rubber spatula or clean hands, working it the whole way to the edges and corners.
- Top the blondies with pieces of biscoff cookies, if desired.
- Bake for 25-30 minutes until the edges are set.
- Cool completely or until still slightly warm, then cut and serve.