Description

These delightful No-Bake Monster Cookies combine creamy peanut butter, oats, and a generous helping of chocolate chips and M&M’s for a fun and easy treat that requires no oven. Perfectly sweet and chewy, they come together quickly and set in the fridge for a convenient grab-and-go snack.

Ingredients

Scale

Base Ingredients

6 tablespoons butter, softened
6 tablespoons sugar
¼ cup brown sugar
¾ cup creamy peanut butter
6 tablespoons quick cooking oats, pulsed in a food processor
1 teaspoon vanilla extract
½ teaspoon salt
1½ cups quick cooking oats, not pulsed
10 tablespoons miniature M&M’s, divided (8 tablespoons and 2 tablespoons)

Chocolate Topping

1 cup semi-sweet chocolate chips
3 tablespoons heavy cream

Instructions

Prepare Baking Dish: Line an 8-inch baking dish with foil or parchment paper to prevent sticking and make removal easier. Set it aside while you prepare the cookie mixture.
Cream Butter and Sugars: In a large mixing bowl, beat the softened butter, sugar, and brown sugar together until light and fluffy. This creates a creamy base for your cookies.
Add Peanut Butter and Flavors: Mix in the creamy peanut butter thoroughly until well combined. Then, add the 6 tablespoons of quick cooking oats that have been pulsed in a food processor to a finer texture, along with the vanilla extract and salt. Stir to distribute evenly.
Fold in Remaining Oats and M&M’s: Gradually add the 1½ cups of unprocessed quick cooking oats and carefully fold them in to maintain texture. Stir in 8 tablespoons of miniature M&M’s to embed some colorful sweetness into the dough.
Press Mixture into Pan: Transfer the cookie dough into the prepared baking dish and press it down evenly with the back of a spoon or your fingers, creating a compact and uniform layer.
Melt Chocolate Topping: In a small microwave-safe bowl, combine the semi-sweet chocolate chips and heavy cream. Heat in 30-second intervals, stirring each time until the chocolate is fully melted and smooth.
Spread Chocolate and Add Toppings: Pour the melted chocolate over the pressed cookie base and smooth it out evenly. Sprinkle the remaining 2 tablespoons of miniature M&M’s on top for added texture and decoration.
Chill and Set: Cover the baking dish with plastic wrap or foil and refrigerate for at least 2 hours, allowing the cookies to firm up and the chocolate to set completely.
Serve: Once set, remove from the fridge, lift the cookie block out using the foil or parchment paper edges, and cut into squares. Enjoy your no-bake monster cookies!

Notes

For best results, use quick cooking oats for the right texture and quick setting.
If you prefer a nut-free option, substitute the peanut butter with sunflower seed butter, but note the flavor will change.
Store cookies covered in the refrigerator for up to one week to maintain freshness.
You can customize by adding other mix-ins like chopped nuts or different candy pieces.
Be sure to pulse only 6 tablespoons of oats in the food processor to avoid making the texture too fine.

Prep Time: 15 minutes
Cook Time: 0 minutes
Category: Dessert
Method: No-Cook
Cuisine: American

Keywords: no-bake cookies, monster cookies, peanut butter cookies, no-bake dessert, quick treat, chocolate peanut butter, oats cookies