This easy slow cooker treat is the kind of clever back-to-school recipe that earns a permanent spot in the dessert rotation: minimal prep, pantry-friendly ingredients, and a sweet payoff that feels a little nostalgic. Using mini marshmallows as the base creates a gooey, candy-like texture once melted, and the crock pot does the work gently, making this a convenient option for busy weeknights, class parties, or casual family movie nights.
Serve these sweet bars or scoops slightly warm on their own, or pair them with cold milk, hot chocolate, or coffee for the adults. If you want to round them out for a party table, add a bowl of fresh strawberries or apple slices nearby to balance the richness, and for lunchbox-style snacking, let the treat cool fully and cut it into neat squares.
4-Ingredient Slow Cooker Marshmallow Peanut Butter Cereal Treat
Servings: 12
Ingredients
4 cups mini marshmallows
1/2 cup creamy peanut butter
3 tablespoons unsalted butter
5 cups crispy rice cereal
Directions
1. Lightly grease the insert of a slow cooker or line a small slow cooker with parchment paper for easier removal. Add the mini marshmallows, peanut butter, and butter to the slow cooker.
2. Cover and cook on low for 30 to 45 minutes, checking once or twice, until the marshmallows and butter are soft and melted. Stir until smooth and fully combined.
3. Turn off the heat and quickly fold in the crispy rice cereal until every piece is coated. Press the mixture evenly into the slow cooker insert or transfer it to a greased 8-inch square pan and press it flat.
4. Let the treat cool for 30 to 45 minutes, then lift out and cut into squares or scoop into rustic clusters. Serve and store leftovers in an airtight container at room temperature for up to 3 days.
Variations & Tips
Nut-Free Version: Swap the peanut butter for sunflower seed butter if you need a school-friendly option with a similar creamy texture and toasted flavor. Stir well after melting, since seed butter can separate a bit more than peanut butter.
Chocolate Drizzle: Once the treats have cooled, drizzle the top with a little melted chocolate for a more dessert-like finish. Let the chocolate set before slicing if you want cleaner squares.
Softer Texture Tip: Avoid cooking the marshmallow mixture too long or on high heat, which can make the finished treats firmer than intended. As soon as the mixture is melted and smooth, fold in the cereal and stop cooking.
Mix-In Idea: A handful of mini chocolate chips or colorful candy-coated chocolate pieces can be folded in after the mixture cools slightly for extra texture and a more festive back-to-school look.