1/2 cup butter 2 1/4 cup brown sugar 1/2 cup milk 3/4 cup peanut butter 1 tsp vanilla extract 3 1/2 cup confectioners sugar

melt butter in a medium saucepan over medium heat. Stir in brown sugar and milk. Bring to a boil and boil for 2 minutes stirring frequently. Remove from heat. Stir in peanut butter and vanilla. Pour over confectioners sugar in a large bowl. Beat until smooth; pour into an 8x8 dish. chill until firm, cut into squares.