S'more Bars with Peanut Butter Cups

I had a bag of peanut butter cups left over after making the hubs peanut butter cake and despite vowing not to attempt anymore S'more recipes, I did and am quite happy I went back on my word! These tasted really good and were incredibly easy to make! My only complaint is that the crust was really crumbly. Next time, I plan to make it with more of a cheesecake crust base and maybe that will help soften it up a bit, then again, don't the bases of S'mores always break when you eat them? These may have renewed my love for S'mores!

S'more Bars with Peanut Butter Cups
Source:
My Adventures in Food
Ingredients
1 stick (1/2 cup) unsalted butter, softened
1/3 c sugar
1 egg
1/2 tsp vanilla extract
2 c graham cracker crumbs
1/3 c flour
Pinch of salt

Toppings
15 mini-peanut butter cups
2 c mini marshmallows
1/2 c semi-sweet chocolate chips

Directions
Preheat oven to 350 degrees and coat a 13x9 inch pan with non stick spray.
Cream together butter, sugar, egg and vanilla in a bowl. Mixture will look slightly curdled. Stir in graham cracker crumbs, flour and pinch of salt. Set aside 1/4 c of the mixture.
Press remaining mixture into the pan, this layer will be quite thin.
Bake for 12 minutes or until golden around the edges. Remove from oven and set oven on Broil setting.
Top the base with peanut butter cups, marshmallows, and chocolate chips. Press toppings into crust slightly, but do quickly because chocolate will melt. Sprinkle the graham cracker mixture over the top. Broil just until the marshmallows toast. Only a minute or two.
Cool bars for at least 30 minutes before cutting. Coat a knife with non stick spray to avoid sticking when cutting the bars.