S’mores Bars

1/2 cup butter, room temperature
1/4 cup brown sugar
1/2 cup granulated sugar
1 egg
1 teaspoon vanilla extract
1 1/3 cups all purpose flour
3/4 cup graham cracker crumbs
1 teaspoon baking powder
1/4 teaspoon salt
2 king-sized Hershey bars (or several smaller bars)
1 1/2 cups marshmallow creme (not melted marshmallows, this is important)

Preheat oven to 350°F. Grease an 8 inch square baking pan.

Cream together butter and sugar with an electric mixer.  Beat in egg and vanilla. In a small bowl, whisk together flour, graham cracker crumbs, baking powder and salt. Add to butter mixture and mix at a low speed until combined.

Divide dough in half and press half of dough into an even layer on the bottom of the prepared pan.

Place chocolate bars over dough in a single layer.

Spread marshmallow creme over the chocolate bars. Place remaining dough in a single layer on top of the marshmallow creme.

Bake for 30 to 35 minutes, until lightly browned. Cool completely before cutting into bars.