This easy 4-ingredient oven-baked Halloween dessert is the kind of simple, nostalgic treat that works beautifully when you want something festive without pulling out a long shopping list. Dry cornflakes cereal bakes up into a crisp, candy-coated snack with plenty of sweet crunch, and a Halloween candy mix gives it that bright seasonal look that makes it especially fun for grandchildren, classroom parties, or casual fall gatherings.
Serve this sweet treat in a big bowl for nibbling, or portion it into small cups or cellophane bags for party favors. It pairs nicely with apple cider, hot cocoa, coffee, or a scoop of vanilla ice cream if you'd like to turn it into a plated dessert. For a Halloween movie night, set it out alongside pretzels, caramel apples, or fresh apple slices to balance the sweetness.
4-Ingredient Oven Baked Halloween Dessert
Servings: 10
Ingredients
6 cups uncooked dry cornflakes cereal
1/2 cup unsalted butter
1 package (10 ounces) mini marshmallows
1 cup Halloween candy-coated chocolate pieces
Directions
1. Preheat the oven to 300°F and lightly grease a 9x13-inch glass baking dish so the sweet cereal mixture releases easily after baking.
2. In a medium saucepan over low heat, melt the butter, then add the mini marshmallows and stir until smooth and fully melted.
3. Place the cornflakes in the prepared baking dish, pour the warm marshmallow mixture over the top, and gently fold until the cereal is evenly coated without crushing it too much.
4. Sprinkle in most of the Halloween candy pieces, fold lightly to distribute, and save a small handful for the top.
5. Bake for 10 to 12 minutes, just until everything is lightly set and the top looks glossy and cohesive. Remove from the oven and scatter the reserved candy over the top while warm.
6. Let the dessert cool for 20 to 30 minutes, then scoop or cut into portions and serve.
Variations & Tips
Add a salty note: A small pinch of salt in the melted butter and marshmallow mixture helps balance the sweetness and gives the finished dessert a more rounded flavor.
Try different candies: Candy-coated chocolates are an easy choice, but candy corn or chopped peanut-free chocolate candies can also work if you want a different Halloween look. Add delicate candies after baking so they hold their shape better.
Keep the cereal crisp: Fold gently and bake only until set. Overmixing can crush the cornflakes, and overbaking can make the candy dull and the texture harder than intended.
Make it easy to portion: For cleaner servings, let the pan cool completely before cutting. If you'd rather keep it casual, scoop it into clusters for a more snack-style presentation.