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Brown Butter Brookies with fudgy dark chocolate brownie layer chewy brown butter chocolate chip cookie dough marbled together in one pan with melty chocolate chunks and flaky sea salt

Brown Butter Brookies

Fudgy chocolate brownies layered under a chewy brown butter cookie top. Rich, nutty, and easy to bake in one pan for a crowd-pleasing dessert bar.
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Prep Time 25 minutes
Cook Time 32 minutes
Total Time 57 minutes
Servings: 9 bars
Course: Dessert
Cuisine: American
Calories: 320
Ingredients Equipment Method Notes

Ingredients
  

  • 1/2 cup unsalted butter, browned - cookie layer
  • 1/2 cup brown sugar, packed - cookie layer
  • 1/4 cup granulated sugar - cookie layer
  • 1 large egg - cookie layer
  • 1 tsp vanilla extract - cookie layer
  • 1 cup all-purpose flour - cookie layer
  • 1/2 tsp baking soda - cookie layer
  • 1/4 tsp salt - cookie layer
  • 3/4 cup chocolate chips - cookie layer
  • 1/2 cup unsalted butter - brownie layer
  • 1/2 cup semisweet chocolate chips - brownie layer
  • 3/4 cup granulated sugar - brownie layer
  • 2 large eggs - brownie layer
  • 1 tsp vanilla extract - brownie layer
  • 1/2 cup all-purpose flour - brownie layer
  • 1/4 cup cocoa powder - brownie layer
  • 1/4 tsp salt - brownie layer

Equipment

  • 8x8 Baking Pan
  • Mixing bowls
  • Saucepan
  • Whisk

Method
 

  1. Brown the butter for the cookie layer and let it cool slightly.
  2. Mix the cookie dough and set aside.
  3. Make the brownie batter and spread it in the pan.
  4. Layer the cookie dough on top and bake until just set.
  5. Cool completely before slicing into bars.

Notes

  • Let the brown butter cool before mixing.
  • Do not overbake, the center firms as it cools.
  • Chill before slicing for cleaner cuts.
  • Store at room temperature for up to 4 days or freeze for up to 2 months.