Biscoff Crumb Bars

4.50 from 4 votes

These Biscoff crumb bars have a thick and chewy base topped with a layer of melty Biscoff spread, then roasted marshmallows and a crunchy crumb topping with a Biscoff drizzle...holy heaven!

Prep Time15

Cook Time25

Total Time40

Course: 100 Best Brownies and Bars Recipes, 500+ Best Dessert Recipes

Keyword: bar dessert, biscoff

Servings: Bars

Author: Sweet Basil

Ingredients

Crumb Topping

3 Tablespoons Sugar
3 Tablespoons Brown Sugar
1/2 Cup Flour
1 teaspoon Cinnamon
1/4 teaspoon Salt
4 Tablespoons Butter softened

Cookie Base

1/2 Cup Butter unsalted, softened
1/2 Cup Sugar
1/4 Cup Brown Sugar
1 teaspoon Vanilla
1 Egg plus 1 egg yolk
1 1/2 Cup Flour
3/4 teaspoon Salt
1 teaspoon Baking Powder
3/4 teaspoon Baking Soda
1 1/2 teaspoon Cream of Tartar
1 Tablespoon Cornstarch
1 Cup Biscoff
2-3 Cups Mini Marshmallows

US Customary - Metric

Instructions

For the Topping

In a small bowl, using a fork or your fingers, combine the sugar, brown sugar, flour, cinnamon, salt and butter. Set aside for later.
3 Tablespoons Brown Sugar, 3 Tablespoons Sugar, 1/2 Cup Flour, 1 teaspoon Cinnamon, 1/4 teaspoon Salt, 4 Tablespoons Butter

For the Cookie Base

Preheat the oven to 350 degrees F and line an 8x8" baking pan with parchment paper.
Mix the butter and sugars until smooth for 1 minute.
1/2 Cup Butter, 1/2 Cup Sugar , 1/4 Cup Brown Sugar
Add the egg, yolk and vanilla and mix again until smooth, scraping down the sides of the bowl.
1 Egg, 1 teaspoon Vanilla
Add all dry ingredients on low speed until well incorporated.
1 1/2 Cup Flour, 3/4 teaspoon Salt, 1 teaspoon Baking Powder, 3/4 teaspoon Baking Soda, 1 1/2 teaspoon Cream of Tartar, 1 Tablespoon Cornstarch
Press the cookie base into the prepared baking dish and bake for 12 minutes. Meanwhile, melt the Biscoff for 20-30 seconds in the microwave.
1 Cup Biscoff
Remove the partially baked cookie base from the oven and gently place on the counter. Top with about a half cup of Biscoff you warmed up in the microwave and spread around to cover the base. Then sprinkle with the mallows followed by the crumb topping and drizzle with about 1/4 cup of Biscoff.
2-3 Cups Mini Marshmallows
Bake another 12-15 minutes. I tent mine with foil for the first half. Remove from oven to cool. Drizzle with a little the remaining Biscoff and serve.

Video

Nutrition