01 -
Warm up your oven to 350°F. Melt the butter completely by microwaving it for around 40 seconds.
02 -
Stir the melted butter with the sugars until it’s smooth. Add the egg and vanilla next, and mix well.
03 -
Gently work in the flour, salt, and baking soda until just mixed together. The dough should feel soft but not too sticky.
04 -
Stir in the marshmallows, chocolate chips, and graham cracker crumbs until evenly spread throughout the dough.
05 -
Scoop out about 3 tablespoons of dough for each cookie. Spread them out with 2 inches between and bake for 10 to 15 minutes till puffed but not overdone.