1, 3.5-ounce bar Lindt Excellence 70%, found in many supermarkets
6 whole (5-inches by 2 ½-inches) graham crackers, broken into quarters
Instructions
Have your grill going at a medium heat. If you have a temperature gauge, aim for 350°F. Have rack set at its most indirect position. Place a 13-inch or larger pizza stone on the rack to pre-heat for at least 30 minutes with top of grill closed.
Coat the insides of a 9-inch cast-iron skillet with nonstick spray. Scatter about 1½ cups of the marshmallows on the bottom of pan. Break chocolate into small pieces and scatter over marshmallows. Top with remaining marshmallows.
Place pan on pizza stone, close grill and bake until marshmallows and chocolate have melted and the tops of the marshmallows are beginning to brown. This can take anywhere from 5 to 15 minutes depending on the grill heat, heat retained in pizza stone, etc. Just bake until done. Serve immediately with graham crackers for dipping. Kids love this but take care with the hot pan.
Recipe by Bakepedia at https://www.bakepedia.com/grilled-smores-dip/