Chewy Brown Butter Biscoff Blondies - Easy One-Bowl
These Brown Butter Biscoff Blondies with White Chocolate Chips are chewy, gooey dessert bars packed with warm spiced cookie butter, nutty brown butter, and melty chocolate in every bite. Easy to make in one bowl, these bakery-style blondies are the perfect treat for cookie butter lovers and guaranteed to impress at any gathering.
Equipment
- 8x8-inch baking pan
- Saucepan
- Large mixing bowl
- Whisk
- Wooden spoon or rubber spatula
- Sharp knife
- Measuring cups and spoons
- Parchment paper (optional but recommended)
- Kitchen scale (optional but recommended)
Ingredients
- 1 stick (115 grams) butter browned
- 1 cup (190 grams) brown sugar
- ½ cup Biscoff cookie spread
- 1 egg + 1 egg yolk room temperature
- 1 teaspoon vanilla extract
- 1 ¼ cups (150 grams) all-purpose flour
- 1 teaspoon baking powder
- ½ teaspoon kosher salt
- ¾ cup semi-sweet chocolate chips
- 6 Biscoff cookies roughly chopped
- pinch flaky finishing salt *if desired
Instructions
- Step 1: Prepare Your Pan and Oven: Preheat your oven to 350°F (175°C). Line an 8x8-inch baking pan with parchment paper, leaving overhang for easy removal. Lightly grease the parchment with butter or baking spray.
- Step 2: Brown the Butter: In a light-colored saucepan, melt the butter over medium heat. Continue cooking, stirring frequently, until it foams and turns golden brown and smells nutty, about 5-7 minutes. You'll see golden-brown bits at the bottom and hear gentle sizzling. Pour into a large mixing bowl and let cool for 5 minutes.
- Step 3: Mix Wet Ingredients: Whisk the Biscoff spread into the slightly cooled brown butter. Add brown sugar, egg, extra egg yolk, and vanilla. Whisk until the mixture is smooth and glossy.
- Step 4: Add Dry Ingredients: Sprinkle the flour, baking powder, and salt over the wet batter. Using a wooden spoon or spatula, gently fold together until just combined. Don't overmix, but you want to see the last streaks of flour disappearing.
- Step 5: Fold in Mix-ins: Gently fold in the chocolate chips and crushed Biscoff cookies into the blondie batter. Reserve a few chocolate chips and cookie crumbles for topping if desired.
- Step 6: Bake to Perfection: Spread the batter evenly in your prepared pan. Sprinkle reserved cookies and chocolate chips on top. Lastly, sprinkle with a pinch of flaky finishing sea salt, if desired. Bake for 25-30 minutes, until the edges are set and lightly golden, and the center still looks slightly soft. A toothpick inserted in the center comes out with a few moist crumbs.
- Step 7: Cool and Cut: Let blondies cool in the pan for at least 30 minutes before slicing. They’ll firm up as they cool. Cut Biscoff blondies into 16 squares with a sharp knife, wiping the blade between cuts for clean lines.
Notes
- Don’t skip browning the butter. It’s the key step that elevates these blondies. Watch closely as it cooks, and remove the pan from the heat as soon as the butter turns golden and smells nutty and fragrant.
- Slight underbake = gooey center. Take the blondies out when the edges are golden but the center still looks soft. They will continue to cook from the residual heat.
- Cool completely: Resist the urge to cut into them while warm. Letting them rest ensures clean slices and the perfect chewy texture.
Storage Instructions
- Room Temperature: Store in an airtight container for up to 4 days.
- Refrigerator: Keep refrigerated for up to 1 week in an airtight container. Bring to room temperature before serving for the best texture.
- Freezer: Freeze individual squares in a zip-top bag for up to 2 months. Thaw at room temperature or microwave for 10–15 seconds.
Nutrition
Calories: 272kcalCarbohydrates: 28gProtein: 1gFat: 19gSaturated Fat: 3gMonounsaturated Fat: 1gCholesterol: 31mgSodium: 137mgPotassium: 60mgFiber: 1gSugar: 23g
Nutrition Facts
Chewy Brown Butter Biscoff Blondies - Easy One-Bowl
Amount per Serving
Calories
272
% Daily Value*
Fat
19
g
29
%
Saturated Fat
3
g
19
%
Monounsaturated Fat
1
g
Cholesterol
31
mg
10
%
Sodium
137
mg
6
%
Potassium
60
mg
2
%
Carbohydrates
28
g
9
%
Fiber
1
g
4
%
Sugar
23
g
26
%
Protein
1
g
2
%
* Percent Daily Values are based on a 2000 calorie diet.
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