in small pan whisk flour into one cup of milk stir over medium heat until mixture becomes thick stir in vanilla. cool completely important has to be cold.

in a bowl mix sugar and butter until combined add cocoa and tablespoon of milk continue to beat on high 2 minutes

add flour, milk, and vanilla mix to sugar and butter beat on high 2 minutes

frost your cake. I like it best when the frosted cake is refrigerated.

if you don't want chocolate frosting omit the cocoa and tablespoon of milk