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Home » Baking » Monster Cookies

Published: February 5, 2019 Last Modified: March 4, 2019 By Sara 52 Comments

Monster Cookies

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These monster cookies are soft and chewy peanut butter oatmeal cookies loaded with chocolate chips and M&M’s. An easy and classic cookie that’s perfect for parties, after school snacks and special occasions.

There’s nothing better than a good cookie, and these loaded monster cookies definitely fit the bill. They’re packed with tons of chocolate, oatmeal and peanut butter and are adored by both kids and adults alike.

Monster Cookies Recipe | Oatmeal Cookies | Peanut Butter Cookies | M&M's Cookies #baking #cookies #dessert #peanutbutter #chocolate #dinneratthezoo Monster Cookies Recipe | Oatmeal Cookies | Peanut Butter Cookies | M&M's Cookies #baking #cookies #dessert #peanutbutter #chocolate #dinneratthezoo

A plate of monster cookies which are made with oats, peanut butter, chocolate chips and M&M's.

I happen to love monster cookies, they’re all of my favorite cookie flavors rolled up into one hand held treat! These monster cookies are the best I’ve ever had. I find that some monster cookies tend to be dry or hard, and my version comes out perfectly soft and chewy every time.

How do you make monster cookies?

This recipe starts out like any other cookie recipe with butter, flour, and sugar. Oats and peanut butter are added into the mix to make a thick cookie dough, and then the add-ins get folded in.

Cookie dough with chocolate chips and M&M's on top.

Traditional monster cookies are made with both M&M’s and chocolate chips, which is what I’ve used here. Other great add-in ideas include

  • White chocolate chips
  • Chopped peanuts
  • Shredded coconut
  • Toffee bits

The dough gets spooned onto a baking sheet and is ready to go into the oven. I like to press some extra M&M’s and chocolate chips into the tops of my cookie dough balls because then they look prettier when they come out of the oven.

Balls of monster cookie dough on a baking sheet.

These cookies don’t spread much, which means you’ll end up with a thick and chewy cookie without a hint of dryness.

Baked monster cookies on a sheet pan.

Tips for monster cookies

  • Use a cookie scoop or a tablespoon measure to make sure all of your cookies are the same size
  • The cookie dough can be stored in the fridge for up to 3 days before baking. If you’re planning to make your dough ahead of time, you may want to omit the M&M’s and add them just before baking so that the color from the candies doesn’t stain the dough if it’s in the fridge for a while.
  • These cookies freeze beautifully. Place them in a single layer in a resealable freezer bag, then freeze until solid. Let the cookies sit at room temperature to thaw.

A stack of monster cookies with a bite taken out of one.

My kids request these monster cookies all the time, and I can’t blame them. Between the soft flavorful cookie and tons of chocolate, how could anyone resist?

More great cookie recipes

  • Red Velvet Cookies
  • Haystack Cookies
  • Funfetti Cookies
  • Avalanche Cookies
  • No Bake Peanut Butter Cookies

Monster Cookies Video


A plate of monster cookies which are made with oats, peanut butter, chocolate chips and M&M's.
Print Pin
4.77 from 17 votes

Monster Cookies

These monster cookies are soft and chewy peanut butter oatmeal cookies loaded with chocolate chips and M&M's. An easy and classic cookie that's perfect for parties, after school snacks and special occasions.
Course Dessert, Snack
Cuisine American
Prep Time 10 minutes
Cook Time 15 minutes
Total Time 25 minutes
Servings 24 servings
Calories 159kcal
Author Sara Welch

Ingredients

  • 1/2 cup butter softened
  • 3/4 cup brown sugar
  • 1/4 cup granulated sugar
  • 1 egg
  • 1/2 cup peanut butter I prefer creamy but crunchy will also work
  • 1 teaspoon vanilla extract
  • 1 cup all purpose flour
  • 1/2 teaspoon baking soda
  • 1 1/4 cups rolled oats
  • 1 cup M&M's plus more for tops of cookies
  • 1/2 cup semisweet chocolate chips plus more for tops of cookies

Instructions

  • Preheat the oven to 350°F.
  • Line a sheet pan with a piece of parchment paper or silicon baking mat.
  • Place the butter, brown sugar, and granulated sugar in the bowl of a mixer. Beat until light and fluffy, 1-2 minutes.
  • Add the egg, peanut butter and vanilla to the bowl and mix until combined.
  • Add the flour and baking soda to the bowl and mix until just combined. Stir in the oats.
  • Add the M&M's and chocolate chips to the bowl and gently fold them into the dough.
  • Make 2 tablespoon sized balls of cookie dough and place them 2 inches apart on the prepared sheet pan. You will need to bake the cookies in batches.
  • Press a few M&M's and chocolate chips onto the top of each cookie dough ball.
  • Bake for 11-13 minutes or until edges are lightly browned. 
  • Cool the cookies on the pan for 5 minutes, then transfer to a cooling rack.
  • Repeat the process with the remaining cookie dough. Cool all cookies completely then serve.
  • Store any leftover cookies in a sealed container for up to 5 days, or you can freeze the cookies for up to 2 months.

Notes

Adapted from Live Well Bake Often.

Nutrition

Calories: 159kcal | Carbohydrates: 18g | Protein: 2g | Fat: 8g | Saturated Fat: 3g | Cholesterol: 17mg | Sodium: 86mg | Potassium: 88mg | Fiber: 1g | Sugar: 10g | Vitamin A: 130IU | Calcium: 15mg | Iron: 0.8mg
Tried this Recipe? Tag me Today!Mention @DinnerAtTheZoo or tag #dinneratthezoo!

This post was originally sponsored by Capri Sun. This post was originally published on April 28, 2016 and was updated on February 5, 2019 with new content.

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Filed Under: Baking, Cookies, Snacks

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    Comments

    1. Elena Toma says

      February 7, 2019 at 10:32 am

      Looking so delicious , I cant believe that the total time to make them is just 25 minutes. I want some !

      Reply
    2. John Mulindi says

      February 7, 2019 at 9:29 am

      Anytime I read your posts, I learn a new way of preparing a given dish or snack. Keep up the good work! Thanks.

      Reply
    3. Lydia Smith says

      February 7, 2019 at 2:25 am

      5 stars
      What better way to keep the kids busy during holidays. More so, the end product looks yummy. I love how you share these recipes with us. Thank you!

      Reply
    4. Sakshi says

      February 7, 2019 at 2:02 am

      Oh my goddd.. These are the cutest. Its my nephews birthday in 2 days. I am trying them tomorrow 🙂

      Reply
    5. natalie says

      February 7, 2019 at 1:38 am

      5 stars
      Oh wow these look amazing! MY kids would love making these – will bookmark this recipe for half term!!!

      Reply
    6. Livetheallieway says

      February 6, 2019 at 6:42 pm

      Wow! The recipe of these cookies are gnarly! Need to think out of the box more often so many ideas! I’m going to keep these in my box of recipes

      Reply
    7. Alexandra says

      February 6, 2019 at 6:38 pm

      5 stars
      Ahhh yum! Monster cookies sound really delicious. This would make a great treat for a party.

      Reply
    8. Chad says

      February 6, 2019 at 3:57 pm

      5 stars
      I am literally drooling over these amazing cookies yummmm!!! I am definitely gonna do some baking this weekend! Thank you so much.

      Reply
    9. Katie says

      February 6, 2019 at 1:07 pm

      These look yummy ! I love the colors. Monster cookies would be perfect for a kids party.

      Reply
    10. Stacie says

      February 6, 2019 at 9:21 am

      5 stars
      Yesss. These bad boys have everything but the kitchen sink! I must have these in my life.

      Reply
    11. Lyosha says

      February 6, 2019 at 9:18 am

      Looks so sweet and festive! Love it! And it is simple to make too, hands up!

      Reply
    12. Tanya says

      February 6, 2019 at 8:52 am

      5 stars
      Oh my goodness, I’ll be printing this recipe! My son will love these.. unless my husband eats them all hahah.

      Reply
    13. Mel says

      February 4, 2019 at 11:00 am

      https://www.dinneratthezoo.com/monster-cookie-bars/ directs to Monster Cookies, tho the picture of the bars (via Bing) appears to be exactly what I’m looking for. When I site search here, I also get Chocolate Peanut Butter Blossoms instead. Where is the recipe for the bars, please?

      Reply
      • Sara says

        February 4, 2019 at 11:22 am

        This post has been updated with new content, you can find the old post here: https://web.archive.org/web/20170513054557/http://www.dinneratthezoo.com/monster-cookie-bars/

        Reply
    14. Robyn @ Simply Fresh Dinners says

      April 30, 2016 at 4:54 am

      5 stars
      Oh my goodness, Sara, your girls are just so squeeze-able! How adorable are they with those cute little bows in their hair? You definitely started my day off with a huge smile 🙂
      Love your monster cookie bars too – they look so delicious!

      Reply
    15. Jennifer @ Seasons and Suppers says

      April 29, 2016 at 4:19 pm

      Love these bars and your girls are absolutely adorable 🙂

      Reply
    16. Tricia @ Saving room for dessert says

      April 29, 2016 at 2:43 pm

      Your girls are gorgeous! What beautiful, beautiful children. You’re going to be in big trouble in a few years 🙂 Love these wholesome and satisfying snacks and I am a big fan of Capri Sun. My grandson loves it! Have a happy weekend – sharing and pinning

      Reply
    17. Debbie says

      April 29, 2016 at 2:33 pm

      5 stars
      Can’t wait to try these bars for my boys! Your girls are darling sipping the Capri Sun!

      Reply
    18. Chris Scheuer says

      April 29, 2016 at 1:01 pm

      Darling girls Sara! Love all that beautiful dark hair. I have a feeling they look like their mama! They certainly look like they love these yummy bars, but I think kids of all ages would enjoy them!

      Reply
    19. Beatrice says

      April 29, 2016 at 12:10 pm

      5 stars
      These bars looks so good and I am a fan of the new Organic Capri Sun! Those girls are so cute!

      Reply
    20. sue|theviewfromgreatisland says

      April 29, 2016 at 11:13 am

      I don;t know what’s cuter, the adorable cookie bars or those adorable munchkins!!

      Reply
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