1. Melt the Butter:
In a small saucepan, melt the butter over medium-low heat. Watch carefully so it does not turn into brown butter. This step is key for a smooth chocolate icing.

2. Combine Cocoa and Sugar:
In a mixing bowl, sift together the unsweetened cocoa powder and powdered sugar. This dry ingredients mix helps get rid of any lumps. It creates a smooth base for your chocolate frosting with cocoa powder.

3. Mix in Milk and Vanilla:
Remove the saucepan from the heat once the butter is melted. Stir in the milk and vanilla extract slowly into the dry mixture. Use a whisk or a spoon to mix until the icing is smooth and creamy. Adjust the tablespoons of milk to get the right consistency.

4. Adjust Consistency:
If the icing is too thick, add an extra tablespoon of milk at a time. If it is too runny, whisk in a little more powdered sugar. The goal is a spreadable and smooth chocolate icing that works for any cake or cupcake.

5. Cool and Use:
Let the icing cool a bit at room temperature before you frost your chocolate cake. Use it immediately on your cake, cupcake, or brownie. This homemade chocolate frosting recipe is ready to top any dessert.