Here's what you need:
22 graham crackers (whole four piece cracker)
1-1/2 cups butter
1-1/2 cups brown sugar, packed
6 cups mini marshmallows
2 cups milk chocolate chips
Line a 15-1/2 x 21-1/2 inch sheet pan with parchment. Line the sheet pan with the graham crackers in a single layer breaking some to fit the pan. Set aside. Preheat oven to 350 degrees.
Pour evenly over crackers and using a spatula completely cover all graham crackers.
Bake for 5 to 6 minutes or until bubbly. Remove from oven
Sprinkle marshmallows and chocolate chips over the graham crackers. Continue baking 2 to 3 minutes or until marshmallows begin to soften.
Serves- approximately 40 bars
Here's the handy printable - S'mores Bars
12 graham crackers
3/4 cup butter
3/4 cup brown sugar
3 cups mini marshmallows
1 cup milk chocolate chips
Follow the same instructions for making and baking