01 -
Set your oven to 350°F and melt the butter in the microwave for about 40 seconds.
02 -
Blend the warm butter with both sugars until smooth. Next, mix in the vanilla extract and egg.
03 -
Stir in the flour, salt, and baking soda just until the dough comes together. It should feel soft but not super sticky.
04 -
Carefully fold the chocolate chips, marshmallow pieces, and graham crumbs into the dough.
05 -
Spoon about 3 tablespoons of dough per cookie, place them 2 inches apart on the sheet, and bake for 10-15 minutes until they look set but fluffy.