1 stick butter
4 tbsp. cocoa
4 tbsp. milk
1 tsp. vinegar
1/2 tsp. cinnamon (optional)
1 box powdered sugar
1 tsp. vanilla

Add vinegar to milk, let set while melting butter in saucepan. Add cocoa to butter, stir until smooth. Remove from heat, add vanilla, cinnamon and milk. Using mixer, blend powdered sugar with cocoa mix.