1/2 cup butter
1 1/2 cup brown sugar
1/2 cup heavy milk or cream
1 1/2 cup peanut butter
1 teaspoon vanilla
3 1/2 cups confectioners sugar
-melt butter in saucepan.
-stir in brown sugar and milk; bring to a boil ( don't take your eyes off it!)
-remove from heat, stir in peanut butter and vanilla.
-pour over confectioner's sugar in bow large bowl. beat until smoth (use an electric mixer-do NOT stire by hand!)
-pour into 8 x8 dish and chill until firm.