Brownie, graham cracker, chocolate chips, marshmallow, and buttery cookie topping. One of the tastiest bars I have ever had!
Ingredients
1 family size box mix of brownies and the ingredients to make the brownies (probably canola oil, water, and 2 eggs)
9-ish honey graham crackers
12 oz semi-sweet chocolate chips (or more!)
4 cups mini marshmallows
1 box yellow cake mix
1 egg
1 stick butter, softened
1 cup sweetened condensed milk

Source Link: http://www.justeverydayme.com/smores-bars/