1 c. brown sugar
1 c. white sugar
1/2 c. peanut butter
1/2 c. milk
1 tsp. vanilla
1 tbsp. butter

Mix first 4 ingredients well and cook over low heat until a soft ball is formed when dropped in cold water. Remove from heat, then add vanilla and butter. Cool and beat until creamy, then pour onto a buttered plate and cut in squares.