crisp organic apples (such as Fuji, MacIntosh, or Gala)
peanut butter (smooth or chunky)
For Parents: Position a rack in the middle of the oven and preheat oven to 350 degrees F. Grease the bottom of a large baking dish. Core each apple, making sure not to cut through the bottom. This will give you a "pocket" in each apple.
For Kids: Place the peanut butter, butter, raisins, and miniature marshmallows in a mixing bowl and stir to blend. Using a teaspoon, stuff each apple with an equal portion of this mixture. Don't worry about making a mess — that's half the fun! Transfer the apples to the prepared baking dish.
For Parents: Bake the apples until they're brown and bubbly on top, about 30 minutes. Transfer the pan to a wire rack and let the apples cool in the pan.