ohhhhh the name says it all!
1/2 cup unsalted butter (1 stick), melted
1 large egg
1/2 cup light brown sugar, packed
2 teaspoons vanilla extract
1 1/2 cups all-purpose flour
pinch salt, optional and to taste
4 graham crackers (standard graham crackers, about 3-inches by 5-inches), chopped into 1/2-inch square pieces (about 1 heaping cup loosely piled pieces)
1 cup semi-sweet chocolate chips
one 14-ounce can sweetened condensed milk
1/2 cup creamy peanut butter
Do It And How 
Wow! These look amazing! Fighting the urge to send this recipe to the wife. Can’t break the diet!