Homemade Cosmic Brownies topped with a Chocolate Ganache and rainbow sprinkles! Super chocolatey, rich, and chewy! Just like your childhood favorite.
Melt butter in a microwave-safe bowl. Allow the butter to cool slightly and then stir in sugars, cocoa, vanilla, and eggs until combined.
Fold in flour and salt, then mix just until combined.
Pour batter into a prepared pan with aluminum foil. Bake at in preheated oven at 350F for 25 minutes or until the edges of the brownies look set.
Allow the brownies to cool completely then frost with chocolate ganache. Place back into the fridge to allow the ganache to set.