This is a family recipe. We have it on butter pecan cake.
Quick Caramel Frosting
2/3 cups margarine
1 cup brown sugar
1/3 cup evaporated milk or cream
3 cups icing sugar
1 tsp vanilla
Melt margarine, add brown sugar. Cook over low heat two minutes, stirring constantly. Add milk, cook and stir until it boils. Remove from heat. Gradually beat in icing sugar and vanilla. Pour over cake and smooth as needed.