S'More Cookie Bars - cooking recipe

Ingredients

1/2 c. (1 stick) butter or margarine, softened
3/4 c. sugar
1 egg
1 tsp. vanilla
1 1/3 c. all-purpose flour
3/4 c. graham cracker crumbs
1 tsp. baking powder
1/4 tsp. salt
4 Hershey's milk chocolate bars (1.55 oz.)
1 c. Marshmallow Creme

Preparation

Heat oven to 350\u00b0.
Grease an 8-inch square pan.
In a large mixing bowl, beat butter and sugar until light and fluffy.
Add egg and vanilla.
Beat well.