1/2 c. butter
1 lb. light golden brown sugar
1/2 c. milk
3/4 c. smooth or crunchy peanut butter
1 tsp. vanilla extract
1 lb. confectioners sugar

In a medium saucepan, melt butter. Stir in brown sugar and milk. Bring to a boil; boil and stir 2 minutes. Remove from heat; stir in peanut butter and vanilla. Mix in confectioners sugar; beat until smooth. Spread into buttered 9 inch square baking pan. Chill until firm. Cut into squares.