Brown Butter Brookies for 16 Bars

Instructions:

1. Melt butter in a saucepan over medium heat. Whisk constantly as it foams; once you see mahogany-colored bits at the bottom and smell a nutty aroma, remove from heat immediately.
2. In a large bowl, beat the browned butter with both sugars until smooth. Add eggs and vanilla, whisking for 2-3 minutes to incorporate air.
3. Divide the butter mixture into two equal portions. In the first portion, stir in the cocoa powder, salt, and 1/2 cup of flour until just combined. Fold in 1/2 cup of chocolate chips. Spread evenly into the bottom of a parchment-lined 8x8 pan.
4. Using the remaining butter mixture, mix in the baking soda and the remaining flour. Fold in the rest of the chocolate chips.
5. Drop spoonfuls of the cookie dough onto the brownie layer. Use a knife or skewer to gently swirl the two together, creating a marbled effect.
6. Place in a preheated oven at 350°F (175°C) and bake for 25–30 minutes until the edges are golden and a toothpick inserted into the center comes out clean.