Old-Fashioned Butter Cake

Melt butter: In a saucepan over medium heat, melt the butter.
Add cocoa: Stir in the cocoa powder and mix until fully combined.
Add powdered sugar and milk: Alternately add powdered sugar and milk while mixing on medium speed until the frosting reaches a smooth, spreadable consistency. Add more milk if necessary to adjust the texture.
Finish with vanilla: Stir in the vanilla extract and mix until smooth and glossy.
Frost your cake: Once the butter cake has cooled completely, spread the frosting generously over the top.
Serving and Storage Tips: