I posted this on another beekeeping forum. It's so good, I thought it was worth sharing here.
This recipe makes enough to frost a two layer cake.
Buttercream Honey Icing
1 1/2 sticks of unsalted butter, slightly softened
1/3 cup honey
4 cups powdered sugar
1Tablespoon milk
Place all in a mixing bowl and beat until creamy. If it's a little too stiff add a bit more milk to make it easy to spread.