Line a 9x13-inch baking pan with parchment paper or foil. Leave a little extra overhang on the short sides to help you remove the frozen s’mores from the pan.
Add the graham crackers in an even layer in the bottom of the pan. You will have to break a few along the perforations to fit them in correctly.
About 20 full sheets of graham crackers
In a large bowl, mix the whipped topping and marshmallow fluff until combined. Set aside.
8 ounces frozen whipped topping, 1 jar marshmallow fluff
Place the chocolate chips in a microwave-safe bowl. Microwave the chips at 50% power for 90 seconds. Stir and continue to microwave at 50% power in 30-second intervals, stirring after each interval, until the chocolate is smooth.
1 bag milk chocolate chips
Spoon half of the melted chocolate onto the graham crackers and spread into an even layer. Sprinkle evenly with the flaky salt.
1 teaspoon flaky sea salt
Next, add all of the whipped topping mixture and spread into an even layer. Follow with the remaining melted chocolate and finally another layer of graham crackers.
Cover the pan with foil or press and seal and place in the freezer for at least 4 hours.
When ready to serve, use the foil or parchment overhang to pull the frozen s’mores from the pan. Cut into squares and serve immediately.
Notes
Keep frozen in the pan (covered tightly with a layer of plastic wrap followed by a layer of foil), or wrap cut s'mores in a layer of plastic wrap and store in a zip-top bag in the freezer for up to 1 month. Inspired by spread.the.grub on Instagram.