100-Hour Brownies:

   • 100-Hour Fudgy Brownies  

48-Hour Brownies:

1 stick (1/2 cup) unsalted butter, melted
1/4 cup Dutched process cocoa powder
1/2 Tbsp espresso powder
1 tsp pure vanilla extract
1/2 cup granulated sugar
1/2 cup light brown sugar
1/4 tsp sea salt + 1/8 tsp for top
4 oz dark chocolate, melted
2 eggs, room temperature
1 1/3 cups all-purpose flour
6 oz dark chocolate chips