I've tried several different S'more Scone recipes, but I really think that What's Gaby Cooking is one of the best. These scones are not too sweet, hold together well, and have a subtle S'mores taste. Recipe follows with just small adaptations.
aka Cora Crawley, Countess of Grantham, S'more Scones
1 1/4 cup all purpose flour
1 1/4 cup graham crackers, pulverized
1 1/2 Tbsp sugar
1 Tbsp baking powder
1/4 tsp salt
3/4 cup mini-marshmallows
3/4 cup semi-sweet chocolate chips
1 1/2 cups heavy cream
Preheat oven to 425 degrees F.
In large bowl, combine flour, graham cracker crumbs, sugar, baking powder, and salt. Mix together with fork. Fold in marshmallows and chocolate chips and mix together. Add heavy cream to dry mixture and combine together with fork until everything just begins to holdstogether. Using hands, form large mounds out of dough, about 1/4 cup of dough for each scone. Place scones onto parchment lined baking sheet and refrigerate for 45 minutes before baking. Place into preheated oven and bake for 13-15 minutes until fully baked. Remove and let cool slightly before serving. Serve with whipped or clotted cream and jam.