Brown Sugar Caramel Frosting

Brown Sugar Caramel Frosting: This frosting is used to frost the filled cookies.  Also a good frosting for banana cake.

7 T  butter
2/3 c brown sugar
1/4 c milk
2 1/4 c powdered sugar
3/4 t vanilla

Melt butter in a small pan over medium heat. Stir in the brown sugar. and cook until sugar dissolves.  Add milk.  Stir in powdered sugar and vanilla.  Beat well.  If the mixture appears to thin add more powdered sugar.