1: Preheat oven to 350°F & line a square baking pan with parchment paper.
2: In a bowl, combine flour, cocoa powder, sugar, baking powder, and salt. Whisk until well incorporated.
3: In a separate bowl, whisk together butter, eggs, milk, and vanilla extract to combine. Add in dry ingredients. Whisk until everything is evenly combined.
4: Pour batter into baking pan. Bake for 55-60 minutes.
5: Let cool completely before eating.
