Easy Caramel Cake - cooking recipe

Ingredients

1 box butter flavored cake mix (bake in 3 layers by directions on box)
1 box light brown sugar
2 sticks margarine
1/2 c. canned milk
1 tsp. vanilla

Preparation

Melt sugar and margarine over low heat.
Add milk.
Boil 3 minutes.
Add vanilla.
Beat until cool and thick.
Ice cake.