Chewy Monster Cookies

Sharing is caring!

Monster cookies are a mashup of all the best cookie elements you can imagine. This chewy, loaded version delivers big flavor and bold texture with every bite. Packed with oats, peanut butter, chocolate chips, and colorful chocolate candies, these cookies are a nostalgic favorite with serious staying power.

What makes them so great is how they hit every craving at once. Sweet, salty, chewy, and crunchy—all in one bite. There’s no need to choose between a chocolate chip cookie and a peanut butter one when you can have both, plus more.

These cookies are big, hearty, and meant to impress. They’re not delicate tea-time treats. These are satisfying, fill-your-hand cookies that feel like something your favorite relative used to make. Except now, you can make them anytime you want.

Monster cookies are also extremely adaptable. Swap in different add-ins depending on what you have: pretzels, nuts, dried fruit, or even white chocolate. But the classic version—with oats, chocolate chips, peanut butter, and M&Ms—is timeless for a reason.

Texture is key here. The oats add chew, the peanut butter adds richness, and the chocolate brings indulgence. It’s all held together in a soft, slightly dense dough that bakes up golden and gooey.

Another thing you’ll love? These cookies are naturally gluten-free if you use certified gluten-free oats. There’s no flour in the base recipe, which keeps them soft and chewy instead of cakey.

This recipe makes a big batch, perfect for parties, road trips, lunchboxes, or late-night snacks. The dough also freezes beautifully. Roll into balls, freeze, and bake just a few at a time whenever the mood strikes.

They’re easy to make, even with all the mix-ins. No need to chill the dough, no special tools. Just mix, scoop, and bake. They spread slightly and puff up with a soft center and lightly crisp edges.

They’re also a hit with kids. All those candy colors and gooey chocolate chips are hard to resist. But adults love them too. It’s like a greatest-hits cookie playlist.

When you want a cookie that does more, that satisfies more, that delivers on all fronts—this is the one to bake.

Servings

Makes about 30 large cookies

Time

• Prep time: 20 minutes
• Bake time: 10-12 minutes
• Total time: ~35 minutes

Ingredients

• 1 cup (2 sticks) unsalted butter, softened
• 1 cup packed brown sugar
• 1/2 cup granulated sugar
• 1 1/2 cups creamy peanut butter
• 2 large eggs
• 1 tsp vanilla extract
• 1 tsp baking soda
• 1/2 tsp salt
• 3 cups old-fashioned oats
• 1 cup semisweet chocolate chips
• 1 cup M&Ms or similar chocolate candies

Instructions

1. Preheat oven to 350°F (175°C). Line baking sheets with parchment paper.
2. In a large mixing bowl, cream together butter, brown sugar, and granulated sugar until fluffy.
3. Add peanut butter and mix until well combined.
4. Beat in the eggs and vanilla.
5. Stir in baking soda and salt.
6. Fold in oats, then chocolate chips and M&Ms.
7. Scoop dough into large balls (about 2 tablespoons each) and place 2 inches apart on baking sheets.
8. Bake for 10-12 minutes, until edges are golden and centers are just set.
9. Let cool on baking sheet for 5 minutes, then transfer to wire rack.

Tips

• Use creamy peanut butter for the best texture—avoid natural types that separate.
• Don’t overbake; they’ll firm up as they cool.
• For perfectly round cookies, gently shape the dough balls before baking.
• Press a few extra M&Ms on top of each dough ball for a bakery-style look.
• Store in an airtight container at room temperature for up to 5 days.

Why You Will Love This Recipe

Monster cookies are comfort food with a kick. They’re satisfying, customizable, and irresistibly chewy. Whether you’re baking for a crowd or just want to fill your cookie jar with something classic and fun, this recipe delivers.

Chewy Monster Cookies are everything you love in one cookie: oats, peanut butter, chocolate chips, and candy. Big, bold, and full of flavor, they’re the ultimate feel-good cookie.