4tbsp.(2 oz.) unsalted buttervery soft, almost melted
2tbsp.cocoa powder
1/2cuppowdered sugar
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Instructions
Preheat the oven to 350 degrees F (180 degrees C) and prepare a cupcake pan with 4 liners.
To make the cupcakes, whisk flour, cocoa powder, baking powder, and baking soda together in a small bowl. Add sugar, egg, oil, vanilla, and milk, and mix until well-combined. Stir in chocolate chips, if using.
Divide batter evenly among 4 cupcake liners. Bake for 12-14 minutes, until a toothpick inserted into the cupcakes comes out clean. Allow to cool for 5 minutes in the pan, then remove to a wire rack to cool completely.
Prepare the frosting by placing the butter in a small bowl. If it is not yet very soft, microwave on medium power for 10-20 seconds, then stir. (It’s OK to have a few pools where the butter has melted.) Add the cocoa powder and stir with a small spatula. Add the powdered sugar and stir until frosting is even and thick. Add more powdered sugar or a few drops of milk if needed to adjust the consistency. Frost and garnish cooled cupcakes as desired.