1 yellow cake mix (Duncan Hines)
1 c. brown sugar, packed lightly
2 c. granulated sugar
1 c. milk
pinch of salt
1 c. extra crunchy peanut butter
1 tsp. vanilla

Bake cake according to package directions in a 9 x 13 inch pan. Leave it in the pan and punch holes all over it with the handle of a wooden spoon. Mix the brown sugar, granulated sugar, salt and milk in a heavy boiler and bring to a boil. Reduce the heat just enough to keep it from boiling over. Stir occasionally. Cook almost to a soft ball stage and add the peanut butter. Continue cooking and rapidly stirring to break the peanut butter up. Cook to a soft ball stage. Add vanilla and stir. Pour over the cake and let set for a few minutes. Serve warm.