S'more Bars Recipe

Directions

1. 1
   Heat the oven to 350 degrees F and arrange a rack in the middle.
2. 2
   Line a rimmed baking sheet with 2 overlapping pieces of aluminum foil so the entire sheet and all 4 edges are covered.
3. 3
   Arrange the graham crackers tightly together in a single layer on the baking sheet, using broken-up pieces to fill any empty spaces; set aside.
4. 4
   Place butter, brown sugar, and salt in a small, heavy-bottomed saucepan over medium heat and bring to a full boil, stirring occasionally with a rubber spatula to dissolve the sugar, about 5 to 6 minutes.
5. 5
   Remove from heat, slowly add vanilla (the mixture may bubble up), and stir to combine.
6. 6
   Pour mixture over graham crackers and spread evenly using the rubber spatula.
7. 7
   Evenly sprinkle marshmallows in a single layer over top.
8. 8
   Bake until marshmallows are puffed and just starting to brown, about 8 minutes.
9. 9
   Remove the baking sheet from the oven and place it on a wire rack.
10. 10
    Evenly sprinkle chocolate chips over the marshmallows and let sit until the chips are softened, about 5 minutes.
11. 11
    Lightly drag a toothpick or skewer over the surface and through the softened chocolate chips to create a marbled pattern.
12. 12
    Evenly sprinkle with nuts, if using.
13. 13
    Let cool until warm, about 20 minutes, then refrigerate or freeze until the chocolate has set, about 15 to 30 minutes.
14. 14
    Remove the smore slab from the baking sheet using the foil to lift it in one piece.
15. 15
    Transfer to a cutting board.
16. 16
    Remove and discard the foil.
17. 17
    Using a sharp knife, cut the slab into 2-inch squares.
18. 18
    Store between layers of waxed paper in a container with a tightfitting lid; the bars will keep in the refrigerator for up to 4 days.