Lucky Charms Stuffed Cookie Bars

A gooey marshmallow-stuffed cookie bar made with Lucky Charms dough and loaded with white chocolate and cereal magic.

Lucky Charms Stuffed Cookie Bars are pure St. Paddy’s Day fun in an 8×8 pan. Soft green cookie dough on the bottom, a thick layer of marshmallow fluff in the center, white chocolate tucked inside, and extra cereal marshmallows scattered throughout. They bake up golden on top and stay soft in the middle, with that creamy marshmallow layer showing when you slice into them. They taste like a cereal and cookie dough mashup with a marshmallow overload. These are the kind of bars you set out on the counter and then suddenly… they’re gone.

Flavor Profile

These bars are sweet, creamy, and slightly nostalgic without tasting artificial. The cookie base is soft and buttery with that subtle cereal flavor baked right in. The marshmallow fluff melts into a thick, almost fudge-like layer that stays tender once cooled.

The white chocolate adds richness and smooth sweetness. The cereal marshmallows bring little pops of texture and color in every bite. The edges get lightly golden and structured, while the center stays soft and gooey.

Why You’ll Love This Recipe

• So much marshmallow! The fluff layer actually shows when you slice it instead of disappearing into the dough.
• Soft center with slightly golden edges that feel substantial but not dry.
• The Lucky Charms cookie dough does the heavy lifting, which keeps prep simple and stress-free.
• Green dough, colorful marshmallows, and festive sprinkles make it instantly themed.
• White chocolate and cereal marshmallows add richness without overpowering the cookie base.
• Once cooled, the bars hold their shape and stack beautifully for parties or school events.

The Twist

The twist is the marshmallow fluff center. Most Lucky Charms desserts either mix cereal into dough or sprinkle marshmallows on top. These bars go full stuffed. The marshmallow fluff becomes a thick, creamy layer right in the middle, almost like a frosting baked inside the cookie. It creates that dramatic slice and a texture contrast you don’t get from cereal alone. That one layer is what makes these feel different from the usual cereal bar or cookie mashup.

Ingredient Highlights

• Lucky Charms cookie dough: This gives you the green base and built-in cereal flavor without mixing from scratch.
• Marshmallow fluff: The key to the creamy center. Don’t spread it all the way to the edges so it doesn’t bubble over.
• White chocolate chips: Adds smooth sweetness and richness that balances the marshmallow.
• Lucky Charms marshmallows: Just the colorful pieces for texture and visual pop.
• St. Paddy’s Day sprinkles: Optional but highly recommended for that festive finish.

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FAQ

Can I use regular sugar cookie dough instead?
Yes, but you’ll lose the cereal flavor. If you go that route, you could mix in a handful of crushed cereal for texture.

Why can’t I spread the fluff to the edges?
It expands as it bakes. Leaving a small border keeps it from bubbling up and making the edges messy.

How do I know when they’re done?
The top should be golden and the center slightly soft. They will continue setting as they cool, especially the marshmallow layer.

Do they need to cool completely?
Yes. The marshmallow center needs time to firm up or the bars will slide apart when sliced.

Can I double the recipe? Absolutely. Bake it in a 9×13-inch pan and watch the center closely. You may need a few extra minutes.

Sprinkle of Fun

Make these bars, pour yourself a bright green mocktail, and turn on Irish Wish on Netflix for the full St. Paddy’s Day experience.

Suggested Recipes

If you like Lucky Charms Stuffed Cookie Bars, then you’ll love the recipes below.

• Lucky Charms Jumbo Cookies
• Lucky Marshmallow Sheet Cake
• Rainbow Sprinkles Lucky Charms Treats