Waffle cones or cake cones Chocolate Chips, chunks of your favorite candy bars, and anything else that is heavenly Peanut Butter Chips Mini Marshmallows Others: You might also love adding caramel bits or bananas or berries. Cover your waffle cone s’mores in tin foil and place in the fire, the oven, or on the grill. For the oven, I have been placing mine in on 350 for about 8-12 min (it will vary depending on the size of cone you are using).