No-bake monster cookie oat cups: a sweet, easy treat!

The viral sensation returns – with a twist!

You all loved our no-bake peanut butter oat cups, and I'm thrilled to introduce the next evolution: the monster cookie version! These are intensely rich, chocolatey, packed with peanut butter, rolled oats, and a rainbow of colorful M&M’s. The best part? There's absolutely no baking required. These easy-to-make, fun-to-share oat cups are perfect for after-school snacks, late-night cravings, or any time you need a quick and delicious dessert.

Inspired by childhood memories

The idea for these no-bake monster cookie oat cups actually comes from childhood trips to Lagoon amusement park in Utah. I’d always pack some fun little M&M energy bites for the kids, and over the years, we experimented with different variations. This recipe is, without a doubt, my family's absolute favorite! It’s a comforting taste of nostalgia with a modern, healthier twist.

Why you'll adore these oat cups

Just one look at these cups and you’ll know you’re in for a treat. But let me tell you why you’ll really love them: they’re no-bake, requiring no oven time. They boast a satisfyingly chewy monster cookie texture and flavor. They’re also colorful and kid-friendly, incredibly easy to make (even kids can help!), made with no refined sugar, and utilize pantry ingredients for ultimate convenience. Plus, they offer a high-protein dessert option!

Ingredients you'll need

These no-bake oat cups come together with simple pantry staples and a few exciting add-ins. Each ingredient plays a crucial role in creating that classic monster cookie flavor, with plenty of chewiness and a delightful chocolatey crunch. Here's what you'll need:

• Old Fashioned Oats: Provide the hearty, chewy base and help everything hold together.
• Protein Powder: Adds structure and a protein boost while maintaining a soft, no-bake friendly texture.
• Peanut Butter: The creamy, rich glue that binds everything together.
• Maple Syrup: Naturally sweetens the mixture with a subtle, cozy flavor.
• Vanilla Extract: Enhances all the flavors and adds a touch of warmth.
• Salt: Balances the sweetness and makes the chocolate and peanut butter really pop.
• Mini M&M’s: Add color, crunch, and that classic monster cookie vibe.
• For the Topping:Chocolate Chips, Peanut Butter Chips, Flaked Salt

Step-by-step instructions

Making these no-bake oat cups is incredibly simple. First, combine all the ingredients for the peanut butter oat base in a medium bowl and mix until well combined. Gently fold in the M&M’s. Spoon the mixture into muffin cups lined with paper liners, distributing evenly across 8 cups. Flatten the mixture as much as possible. Freeze for at least 2 hours. Then, melt your chocolate and peanut butter chips, top the cups, and enjoy!

Variations and add-ins

Feel free to get creative and personalize these oat cups! Swap the peanut butter with almond butter or sunbutter. Substitute the M&M’s with Reese’s Pieces or mini chocolate chips. Coconut lovers can add some coconut flakes for extra texture and sweetness. The possibilities are endless!

Storage tips

Leftover no-bake monster cookie cups should be stored in the refrigerator or freezer in an airtight container. They’ll keep for up to a month, though they probably won’t last that long!

More easy no-bake desserts

If you’re a fan of no-bake treats, be sure to check out these other delicious recipes: Gooey Rice Krispie Treats, No-Bake Caramel Cheesecake Bars, No-Bake S’mores Bars, Classic No-Bake Cookies, and No-Bake Mini Cheesecakes. Happy baking (or rather, not baking)!