Creating The Best Fudgy Chewy Brownies (Brookies) involves a few straightforward steps. Follow these instructions carefully for the ultimate delight:

1. Preheat Oven: Start by preheating your oven to 350°F (175°C). Grease an 8×8-inch baking pan or line it with parchment paper for easy removal.
2. Prepare Brownie Mixture: In a medium saucepan, melt the butter over low heat. Stir in sugar, eggs, and vanilla until fully combined. Add the cocoa powder, flour, salt, and baking powder. Mix until there are no visible lumps.
3. Spread Brownie Base: Pour the brownie batter into the prepared pan, spreading it evenly across the bottom.
4. Prepare Cookie Mixture: In a large bowl, cream together the softened butter, brown sugar, and granulated sugar until light and fluffy. Mix in the egg and vanilla. In a separate bowl, whisk together the flour, baking soda, and salt. Gradually add the dry mixture to the wet mixture, stirring until blended. Fold in chocolate chips if desired.
5. Add Cookie Layer: Carefully place spoonfuls of the cookie dough on top of the brownie batter, smoothing it out gently to cover the surface.
6. Bake: Place the pan into the preheated oven and bake for approximately 30-35 minutes. A toothpick inserted into the center should come out with moist crumbs, not completely clean.
7. Cool: Once baked, allow the brownies to cool in the pan for about 10-15 minutes before transferring to a wire rack to cool completely.
8. Slice and Serve: Once cooled, slice into squares or rectangles for serving.

By carefully following these steps, you’ll be well on your way to creating The Best Fudgy Chewy Brownies (Brookies).