1 C. Butter, Melted
3/4 C. Cocoa
2 C. Sugar
4 Eggs
1 1/2 C. Flour
1 tsp. vanilla
Stir butter and cocoa together. Add sugar. Add eggs one at a time stirring after each time. Add Flour and vanilla. Stir until well combined.
Pour into a greased 13x9 and baked at 350 for 20 minutes or until a toothpick comes out clean.
For extra chocolatey goodness, sprinkle chocolate chips on top before baking.