These Lucky Cereal Bars are a nostalgic treat with a modern twist, combining the crunch of cereal with a chewy, buttery base. Perfect for snacking or sharing, they’re ready in just 45 minutes, with minimal hands-on time. The blend of sweet marshmallow and rich butter creates a gooey texture that’s irresistible, while the colorful cereal adds a playful pop of flavor and crunch.
Packed with hints of vanilla and a touch of salt to balance the sweetness, these bars are a delightful mix of textures and tastes. Whether you’re making them for a party or a quick treat, they’re sure to bring smiles and satisfy cravings with every bite.
What You’ll Need for Lucky Cereal Bars

- 6 cups Lucky Charms Cereal (reserve a few marshmallows for topping, if desired)
- ½ cup butter (unsalted works best, but salted is fine too)
- 10 ounces mini marshmallows (1 standard package)
- Non-stick cooking spray (for greasing the pan and your hands)
How to Make Lucky Cereal Bars
- Prepare the pan: Spray a 9×13 inch baking dish with non-stick cooking spray. Set aside.
- Measure the cereal: Place 6 cups of Lucky Charms Cereal in a large mixing bowl. If desired, set aside a small handful of the cereal marshmallows for topping later.
- Melt the butter: In a large pot or saucepan, melt the butter over medium/low heat. Stir occasionally to prevent burning.
- Add marshmallows: Once the butter is fully melted, add the mini marshmallows. Stir continuously until the marshmallows are completely melted and the mixture is smooth.
- Combine with cereal: Remove the pot from heat and gently fold in the Lucky Charms Cereal. Stir until the cereal is evenly coated with the marshmallow mixture.
- Press into the pan: Transfer the mixture to the prepared baking dish. Use a rubber spatula or your hands (lightly sprayed with non-stick cooking spray) to press the mixture evenly into the pan. If reserved, sprinkle the extra marshmallows on top.
- Let it set: Allow the bars to cool and set at room temperature for about 30 minutes.
- Slice and serve: Once set, cut into squares or rectangles and enjoy!
Fun Topping & Drizzle Ideas
Take your Lucky Cereal Bars to the next level by adding a few fun toppings or drizzles! Try melting a handful of chocolate chips and drizzling it over the bars for a sweet twist. You can also sprinkle crushed nuts, colorful sprinkles, or even a dusting of powdered sugar for extra flair. For a salty-sweet combo, a light sprinkle of sea salt works wonders.
Perfect Portions: Serving Tips
These bars are a hit at parties, potlucks, or as an after-school snack. Cut them into bite-sized squares for a party platter or larger rectangles for a hearty treat. Pair them with a glass of cold milk or a scoop of vanilla ice cream for an indulgent dessert. They’re also great packed in lunchboxes for a surprise midday treat!
Keep ‘Em Fresh: Storage Tips
Store your Lucky Cereal Bars in an airtight container at room temperature for up to 3 days. If you’d like to keep them longer, wrap them individually in plastic wrap and freeze for up to 2 months. Thaw at room temperature for 10-15 minutes before serving. Just be sure to keep them away from warm areas to prevent the marshmallows from melting.
Quick Swaps: Recipe Variations
Not a fan of Lucky Charms? Swap in your favorite cereal for a personalized twist! Rice Krispies, Cocoa Puffs, or even granola work well. For a richer flavor, use brown butter instead of regular butter. If you’re feeling adventurous, add a handful of pretzels or dried fruit to the mix for extra texture and flavor.
Sticky Situation Solved: Pressing Tips
Pressing the marshmallow-cereal mixture into the pan can get a little sticky. For a mess-free experience, *lightly spray your hands or a piece of parchment paper* with non-stick spray before pressing. This keeps everything smooth and evenly distributed without the frustration of sticky fingers.

Lucky Cereal Bars Recipe
Ingredients
- 6 cups Lucky Charms Cereal
- ½ cup butter
- 10 ounces mini marshmallows 1 package
Instructions
- Spray a 9 x 13 inch baking dish with non stick cooking spray.
- Measure out the Lucky Charms and place in a big bowl.
- Melt the butter in a large pot or saucepan over medium/low heat.
- Add the marshmallows and stir until all are melted.
- Gently fold in the cereal until it is completely coated with marshmallow.
- Using a rubber spatula or your fingers, press gently into the prepared pan. Spray your fingertips with non stick cooking spray and it will be easier to spread around.
- We like to reserve a few of the cereal marshmallows for the top of the bars.
- Let set up for about 30 minutes. Slice and serve.