2 c. brown sugar
2 c. white sugar
3/4 c. milk
Dash of salt
1 tsp. cornstarch
12 oz. jar peanut butter
7 1/2 oz. jar marshmallows fluff
1 tsp. vanilla

Mix first 5 ingredients in large pan. Boil for 5 minutes. Remove from heat; add rest of ingredients. Beat until fudge begins to thicken. Pour into buttered 9 x 13 inch pan.