1/4 cup margarine
1/4 cup butter
1 cup brown sugar
1/4 cup milk
2 cups powdered sugar
Heat margarine and butter until melted.
Add brown sugar.
Heat to boiling, stirring constantly.
Boil and stir on low for 2 minutes.
Stir in milk. Heat to boiling.
Cool until lukewarm.
Gradually stir in powdered sugar.
Place pan in sink of cool water and beat.
until smoothe and spreading consistency.
If needed, add more milk 1 Tbsp at a time.
This is great on a Super Moist Spice Cake!