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a stack of chocolate crumble bars

Chocolate Toffee Crumble Bars

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5 from 1 review


These chocolate crumble bars have a rich brown butter crumble baked with a molten chocolate center. The textures and flavors are so rich and yet this treat is so quick and easy to make!


Brown Butter Crumble

  • 1/2 cup (110g) unsalted butter (regular or plant-based)
  • 1 tsp vanilla extract
  • 1 cup (132g) all-purpose flour
  • 1 1/4 cup (125g) quick oats
  • 1/2 cup (108g) light brown sugar, packed
  • 1/2 tsp baking powder
  • 1/2 tsp kosher salt

Chocolate Filling

  • Heaping 3/4 cup (200g) Chocolate SunButter
  • 1 cup (145g) semisweet chocolate chips
  • 1/2 cup (70g) toffee bits (omit if making vegan)


Chocolate Crumble Bars

  1. Brown the butter in a saucepan then pour into a measuring glass.
  2. Mix in 2 tablespoons of water and vanilla extract. Place into the refrigerator to chill for about 15 minutes.
  3. In the meantime, preheat the oven to 350F and grease and line an 8×8 square baking dish with parchment paper.
  4. Then in a large mixing bowl, mix together the rest of the crumble ingredients with your hands (this helps break up any brown sugar lumps).
  5. Once the butter has cooled (it can be warm but not piping hot), mix into the dry ingredients using a rubber spatula.
  6. Press about 2/3 of the dough into the bottom of the baking dish. Bake for 8 minutes.
  7. Once baked, spread the chocolate SunButter on top and sprinkle with a layer of chocolate chips then a layer of toffee bits.
  8. Sprinkle the remaining crumble on top and bake for 20-23 minutes.
  9. Allow the bars to cool completely either at room temperature or in the refrigerator. Then lift them out, slice, and enjoy!
  • Prep Time: 30 minutes
  • Cooling Time: 1 hour
  • Cook Time: 30 minutes
  • Category: Dessert
  • Method: Baking
  • Cuisine: American
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