Completely decadent frosted brownies perfect for parties, potlucks, and bake sales.
In a large bowl, whisk together melted and cooled butter and sugar until well-mixed. Add eggs and vanilla extract and beat until well-combined.
Add flour, sifted cocoa powder, baking powder and salt. Use a wooden spoon or spatula to stir until combined.
Bake for 27-35 minutes, until a toothpick or cake tester inserted into the center of the brownies comes out with just a few moist crumbs.
Cool completely before frosting.
In a large bowl, beat butter until light and fluffy. Add powdered sugar, cocoa powder, vanilla, optional espresso powder, and salt. Pour in milk as you beat the frosting until it reaches your desired consistency, adding more milk by the 1/2 teaspoon if necessary.