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    Home » Recipes » Desserts

    Oatmeal Monster Cookies

    Author: Peter Kolesnichenko · Published: Sep 13, 2022

    Jump to Recipe

    These Oatmeal Monster Cookies are packed with flavor. A large batch cookie recipe made with oatmeal, peanut butter, chocolate chips and Smarties. You'll want to stock your freezer with these cookies. Boost your energy with these hearty cookies as a snack.

    Monster cookies on a plate
    monster cookie ingredients in mixer
    mixing cookie dough

    What are Monster Cookies?

    Monster Cookies are an American cookie that's loaded with goodies. It's a hearty oatmeal cookie made with peanut butter and a variety of chocolate chips. They're an oatmeal-chocolate chip cookie on steroids.

    M&Ms or Smarties

    Candy coated chocolates are a key ingredient in Oatmeal Monster Cookies. Usually, they are made with classic chocolate M&M's. You could use flavored M&Ms like Peanut, Caramel or Crispy M&Ms. However, I prefer using Smarties because I like the candy coated flavor better.

    Best Oatmeal for Cookies

    There are many different types of oatmeals in supermarkets, how do you know which one to use? Rolled Oats are the most versatile oat which I recommend for this cookie recipe. This is the oat used in cookies, muffins, breads and more because they retain their texture when baked. They are also called Old Fashioned Oats.

    mixing cookie dough with smarties
    scooping monster cookie dough

    Key Ingredients

    • 7 Eggs - you read that right, this is a large batch cookie recipe
    • 1 ½ cups Brown Sugar
    • 3 ½ cups White Sugar
    • 1 ½ cups Margarine
    • 2 cups Peanut Butter
    • 4 cups Flour
    • 5 cups Rolled Oats
    • 2 cups Chocolate Chips
    • 2 cups Smarties
    • Vanilla, Baking Powder and Corn Syrup

    How to Make Oatmeal Monster Cookies

    • Preheat oven to 350°F/175°C. Prepare baking sheets.
    • Using a mixer, combine eggs, brown sugar, white sugar, vanilla, margarine, peanut butter, corn syrup until whipped evenly.
    • Slowly add the baking soda and flour, mixing with a wooden spoon. Mix in the oats.
    • Add the chocolate chips and Smarties.
    • Drop a large scoop (about 3 tablespoons) of cookie dough onto the baking sheet and bake for 10-12 minutes.
    • Allow cookies to set for 5 minutes before removing them onto a cooling rack.
    cookies on a baking sheet
    cooling rack of cookies

    Pro Tips and FAQs

    • Baking Tip - Using baking paper on the baking sheet works better than spraying with cooking spray.
    • Chocolate Flavors - substitute chocolate chips with white, toffee or butterscotch chocolate chips
    • Peanut Butter - Jif or Skippy Peanut Butter works best when baking homemade cookies. All natural peanut butter dries out the cookies.
    • Make it colourful - After placing scoop of monster cookie dough onto the baking sheet, position the Smarties on top of the cookies to make it more colorful.
    • Use a Stand Mixer - this is a large batch cookie recipe, so a KitchenAid mixer has enough power to beat the egg and margarine mixture until light and fluffier.

    How to Make Chewy Cookies

    Allow your oatmeal cookie dough to rest in the fridge for about an hour before baking. Increasing corn syrup in your recipe also helps retain moisture in your cookies. Add a quarter cup for this recipe and see how you like it. Brown sugar also keeps cookies moist and soft.

    Can Monster Cookies be Frozen?

    YES! These cookies freeze really well. If you're going to go through the effort of making cookies, make them last longer than the family eating them all in one sitting! Allow to cool, put in a Ziploc bag and place in the freezer. Best if eaten within a few months after freezing.

    monster cookies on a plate

    Easy Treats You'll Love

    • Puff Pastry Apple Turnovers
    • Honey Joys - Cornflake Cupcakes
    • Caramel Rice Krispies
    • Birds Nest Cookies
    • Easy Spice Cookies
    • Russian Honey Cookies

    These delicious easy monster cookies recipe won't last long! Perfect back-to-school cookies you can pre-make before school starts and keep in the freezer. Your family will devour these oatmeal cookies and ask for more. Bon Appetit! Приятного аппетита!

    Monster cookies on a plate

    Oatmeal Monster Cookies

    Everything you want in Oatmeal Monster Cookies like oats, chocolate chips, peanut butter and Smarties! This large batch cookie recipe makes enough to feed a small army! Oatmeal cookies on crack!
    4.98 from 34 votes
    Print Recipe Pin Recipe Rate Recipe
    Prep Time: 10 minutes
    Cook Time: 12 minutes
    Course: Dessert
    Cuisine: American
    Keyword: monster cookies recipe, oatmeal monster cookies
    Servings: 75 cookies

    Equipment

    • KitchenAid Mixer
    • Ice Cream Scoop

    Ingredients

    • 7 eggs
    • 1 ½ cups brown sugar firmly packed
    • 3 ½ cups white sugar
    • 1 ½ teaspoon vanilla
    • 1 ½ cups margarine softened to room temp
    • 2 cups peanut butter
    • 1 ½ teaspoon corn syrup or golden syrup
    • 4 teaspoons baking soda
    • 4 cups flour
    • 5 cups rolled oats
    • 2 cups chocolate chips
    • 2 cups Smarties

    Instructions

    • Preheat oven to 350°F/175°C. Prepare baking sheets by spraying with non-stick spray or line with baking paper.
    • Using a mixer, combine eggs, brown sugar, white sugar, vanilla, margarine, peanut butter, corn syrup until whipped evenly.
    • Slowly add the baking soda and flour, mixing with a wooden spoon. Mix in the oats.
    • Add the chocolate chips and Smarties mix throughout.
    • Using an ice-cream scoop, drop a scoop onto the cookie sheet and bake for about 10-12 minutes.
    • Allow cookies to set for 5 minutes before removing them onto a cooling rack. 
    Tried this recipe?Mention @petersfoodadventures or tag #petersfoodadventures!

    ©PetersFoodAdventures.com

    monster cookies on a plate
    how to make monster cookies

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    Reader Interactions

    Comments

    1. The Creators Toolbox

      September 30, 2015 at 6:11 am

      Love your website!

      Reply
      • PetersFoodAdventures

        September 30, 2015 at 7:35 am

        Thank you very much! 🙂

        Reply
    2. Sadie's Nest

      August 30, 2015 at 7:33 pm

      yummy!

      Reply
      • PetersFoodAdventures

        August 30, 2015 at 9:03 pm

        thanks for stopping by! they are so yummy! 🙂

        Reply
    3. Janice Wald

      August 30, 2015 at 3:04 pm

      Hi Peter,
      I know Rachel Mankowitz. I met you in the Community Pool. I read you are a new blogger. I help new bloggers at my site. Click my name to check my blog out. There is even a free incentive for signing up. By the way, I love to travel too. Nice meeting you.
      Janice

      Reply
      • PetersFoodAdventures

        August 30, 2015 at 9:14 pm

        thanks, I'll check it out

        Reply
    4. Gretchen

      August 30, 2015 at 7:40 am

      These look fantastic. Funny but I've never made monster cookies. Perhaps it's time to finally make some, I'm sure my boys would be thrilled with that! I almost always freeze cookies after I bake. It's nice to have a stash in the freezer for cookie "emergencies".

      Reply
      • PetersFoodAdventures

        August 30, 2015 at 9:02 am

        Thank you! I love cookie "emergencies"! lol Hope you try it. Let me know how they worked out!!! 🙂

        Reply
    5. Lynz Real Cooking

      August 30, 2015 at 2:38 am

      Hi, yummm

      Reply
      • PetersFoodAdventures

        August 30, 2015 at 2:41 am

        yup, I thought I was going to freeze half, but they're almost gone!!! 🙂

        Reply
        • Lynz Real Cooking

          August 30, 2015 at 2:43 am

          I know! They go fast and they look delicious!

          Reply
          • PetersFoodAdventures

            August 30, 2015 at 2:47 am

            Thanks so much! You always say such nice things! 🙂

            Reply

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