Reese Bars - cooking recipe

Ingredients

2 c. peanut butter
1 c. brown sugar, packed
1/2 c. (1 stick) butter, melted
1 tsp. vanilla
1 lb. confectioners sugar

Preparation

Mix first 4 ingredients until smooth.
Add confectioners sugar a little at a time (you will need the full pound) until smooth and spreadable.
Spread in a buttered 13 x 9-inch pan.