Table of Contents
  1. Watch how to make these monster cookies
  2. Monster Cookies Recipe

How is it that we never tire of cookies!? Maybe I’m speaking for myself but cookies are always a good idea. Sad? Make cookies. Happy? Make cookies. Need a gift? Make cookies! Honestly, they are such a delicious treat with endless possibilities. Every time I think I’ve seen all the recipes I could possibly find, a whole new cookbook finds me! I feel like everyone loves monster cookies: peanut butter, oats, candy – what isn’t to love?!

As most of my cookies do, these freeze wonderfully – if you have any left to freeze!

Three monster cookies sitting on cooling rack with lots of M&M's and cookie jar in background
Monster cookie made from oats sitting on cooling rack with two other cookies with M&M's sprinkled underneath rack with glass cookie jar in background
One monster cookie broken in half sitting on cooling rack showing inside of cookie with white surface underneath

Watch how to make these monster cookies

YouTube video
Large monster cookie made from oats and M&M candies sitting on wire cooling rack on white surface with two other cookies in background

Monster Cookies

5 from 3 votes
Who doesn't love a monster cookie?! The very idea of it is simply intoxicating as everyone wants as large a cookie as they can get! This cookie is made with oats and M&M's, which is a perfect pairing in anyone's book. One taste and you'll be hooked!
Prep Time 20 minutes
Cook Time 10 minutes
Total Time 30 minutes
Servings 36 cookies


  • ½ cup butter room temperature
  • 1 cup brown sugar
  • 1 cup white sugar
  • 3 eggs
  • 2 tsp vanilla extract
  • 1 tbsp water
  • 1 ½ cup peanut butter
  • ½ cup all-purpose flour
  • 2 tsp baking soda
  • ½ tsp salt
  • 4 cups rolled oats
  • ¾ cup chocolate chips
  • 1 cup miniature M&M candies


  • Cream the butter and sugars in the bowl of an electric mixer until light and fluffy, 3-5 minutes.
    ½ cup butter, 1 cup brown sugar, 1 cup white sugar
  • With the mixer running on low, add eggs one at a time, letting each incorporate.
    3 eggs
  • Mix in vanilla extract and water.
    2 tsp vanilla extract, 1 tbsp water
  • Mix in peanut butter.
    1 ½ cup peanut butter
  • Add flour, baking soda, salt, and oats.
    ½ cup all-purpose flour, 2 tsp baking soda, ½ tsp salt, 4 cups rolled oats
  • Once mixed, stir in chocolate chips and M&M candies.
    ¾ cup chocolate chips, 1 cup miniature M&M candies
  • Using a cookie scoop, place cookies on a parchment-lined baking sheet and bake in preheated 350°F oven for 8-10 minutes. The edges will be golden and set with a soft center.
  • Remove from oven and cool on baking sheet for 5 minutes. Then finish cooling on a cooling rack for 10-15 minutes.


Serving: 1cookieCalories: 227kcalCarbohydrates: 27.6gProtein: 4.8gFat: 11.1gSaturated Fat: 4.6gPolyunsaturated Fat: 1.5gMonounsaturated Fat: 3.7gTrans Fat: 0gCholesterol: 23.1mgSodium: 159.8mgPotassium: 192.9mgFiber: 2gSugar: 18.3gVitamin A: 28.2IUVitamin C: 0mgCalcium: 24.3mgIron: 0.8mg
Course Cookies
Cuisine American
Difficulty Intermediate
Method Baking

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I’m Kaleb! I'm not a chef, professional baker, landscaper, or designer, but I like to play each on Knollgate Farm. Come join me on my journey and let's learn together!

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  1. OMGosh ! these cookies are so good. I made the cookies just as on the video. Easy to make. P.S. I love to watch your video. You make baking so much fun!

  2. 5 stars
    Thanks for this recipe! My new favourite. You are so great! Love your videos & you.