Preheat the oven to 350°F. Lightly grease an 8x8 pan and line with parchment paper.

In a small microwave-safe bowl, melt butter and chocolate chips in 15 second increments while stirring between increments until fully melted.

Melt butter in a medium microwave-safe mixing bowl. Mix in both sugars, then add vanilla extract and eggs.

Fold in melted chocolate chips. Mix in flour, salt, and cocoa powder until just combined. Pour batter into the prepared baking pan and spread to smooth the top evenly.

Bake for 28-35 minutes, check them after 28 minutes frequently, secret to fudgy brownies is to undercook them so that they continue to slightly bake while cooling but not too much. When it's time to take them out of the oven, they'll jiggle ever so slightly in the middle and cooked around the edges.