Preheat the oven to 350 degrees Fahrenheit. Line two sheet pans with parchment paper.
Add the flour, cocoa powder, baking powder, and pudding mix to a large mixing bowl and whisk to combine. Set aside.
In the bowl of your mixer, beat together the butter, eggs, brown sugar, and vanilla until smooth and slightly fluffy, about five minutes.
Using a 3-tablespoon-size cookie scoop, scoop out balls of dough and place them, evenly spaced on the sheetpans.
Bake the cookies in the preheated oven for about 12 minutes, or until the cookies are no longer gooey, then immediately press them down slightly with the back of a spatula to create more of a “disk” shape.
Carefully transfer the cookies to a wire cooling rack to cool completely.