White plate full of monster cookies
Cookies

Monster Cookies

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I just love this monster cookies recipe! Monster cookies are a mix of a handful of different cookies all together in one Frankenstein monster cookie, haha.

Take my favorite chocolate chip cookie recipe, oatmeal raisin cookie recipe, and peanut butter cookie recipe and blend them all together and add some M&Ms and you have these amazing homemade monster cookies.

These monster cookies are so soft, chewy, and oh so delicious. And they are very easy to make, if I can make them, you can make them. If you love cookies, you have got to try these. Let’s get baking!

Step 1: Gather the ingredients

Several ingredients in bowls on a wooden table.

In order to make monster cookies from scratch you need several easy to find ingredients:

  • Oats – Use the old-fashioned rolled oats, not the quick oats.
  • Flour – All purpose/plain flour
  • Baking soda
  • Salt
  • Butter – Make sure it is soft and room temperature. Use salted or unsalted butter.
  • Brown sugar – It can be light or dark. It will help to produce a chewier cookie.
  • White granulated sugar
  • Egg
  • Vanilla extract
  • Peanut butter – Use store-bought peanut or my homemade peanut butter.
  • Chocolate chips – I like to use semi-sweet, but milk, dark, or white can be used as well.
  • M&Ms – These are probably the most classic ingredient for monster cookies.
  • Chopped nuts – Mixture of peanuts, pecans, walnuts, etc. These are optional, I don’t always add them, but I like the texture and crunch it gives them.
Three monster cookies on a wire rack.
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Tools

Step 2: How to make monster cookies at home

Dry ingredients whisked together in a medium glass bowl.

Begin by preheating the oven to 350 F/176 C. Place the main rack in the middle position.

In a medium bowl whisk together the oats, flour, salt, and baking soda.

Large glass bull full of creamed butter and sugar.

Add both sugars and the softened room temp butter to a large bowl.

TIP: If you forget to take the butter out of the fridge, you can soften it up in the microwave on defrost mode.

Use a mixer and cream those ingredients together for a minute or two until it becomes a light tan color. Scrape the sides of the bowl with a spatula as needed to ensure everything gets evenly mixed.

Monster cookies batter in large glass bowl.

Add in the egg and the vanilla extract and mix until just combined. Next, add in the peanut butter and mix until just combined. You can now put the mixer away, the rest will be done by hand.

NOTEIf you don’t have a mixer, use a sturdy whisk or wooden spoon.

Step 3: Finish the monster cookies dough

Monster cookies dough in a large glass bowl without the chocolate chips and M&Ms.

Add in the dry ingredient mixture a third of it at a time, just stir it in with a spoon, mixing it in.

Then add in the chocolate chips, M&Ms, and chopped nuts. The nuts are purely optional, I like the texture it adds, and I just like nuts, to begin with.

Finished monster cookies dough in a large glass bowl.

Just like that, the monster cookie dough is ready to go.

Step 4: Bake those cookies!

Use a couple of large spoons and scoop out a heaping tablespoon of cookie dough and place it on a sheet pan or cookie sheet lined with parchment paper or a silicone baking mat.

You should be able to get around 12 cookies on each pan, for a total of 24 cookies. Give or take a few depending on the size they wind up being.

Bake in the oven, middle rack position, again 350 F/176 C for 10 to 14 minutes. In my oven 12 minutes is perfect.

Freshly baked monster cookies on a sheet pan with a silicone baking mat

The cookies will be lightly golden brown on the edges and the tops. Allow the cookies to cool 5 to 10 minutes on the pan.

Homemade monster cookies on a wire cookie rack.

After they have cooled on the pan for a bit, transfer them to a wire rack to cool completely. Don’t move them too soon, or they may fall apart on you. If that does happen, don’t worry about it, it won’t affect the taste at all.

Time to dive into those monster cookies. Enjoy!

How long do monster cookies last?

If stored in a zip lock bag or an airtight container the cookies will last 4 to 5 days at room temp. They will last even longer in the fridge. You can also freeze the cookies for a few months.

Can I freeze the monster cookies dough?

Sure you can freeze the dough. I recommend forming the cookie shapes first then placing the pan in the freezer. After they have frozen for a few hours, they can be moved and stacked in a freezer bag for long term freezer storage. Freezing them flat and separated at first, helps keep them from sticking to each other.

Monster cookies pin for Pinterest
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Here are a few other recipes you may like:

Cake Mix Peach Cobbler

Pumpkin Cookies

Red Velvet Cake Mix Crinkles

White Chocolate Macadamia Nut Cookies

Lemon Butter Cookies

Monster Cookies

These monster cookies are awesome! They are soft, chewy, and oh so delicious. They are a blend of all my favorite cookies, chocolate chip, peanut butter, and oatmeal.
Prep Time20 mins
Cook Time12 mins
Cooling Time15 mins
Total Time47 mins
Course: Cookies, Dessert
Cuisine: American
Keyword: chewy, easy, soft, sweet
Servings: 24 people
Calories: 212kcal
Author: Matt Taylor

Equipment

  • Hand mixer
  • Bowls
  • Spatula
  • Cookie sheet or sheet pan
  • silicone baking mat or parchment paper
  • Spoons
  • cookie rack
  • Whisk
  • Wooden spoon or Silicone Spoon

Ingredients

  • 1 1/4 cups oats use old-fashioned not quick oats. (135g)
  • 1 cup all-purpose flour 120g
  • 1 tsp. baking soda 5g
  • 1/2 tsp. salt 2g
  • 1/2 cup softened room temp butter unsalted or salted (113g)
  • 3/4 cup brown sugar light or dark 200g
  • 1/4 cup white granulated sugar 50g
  • 1 large egg
  • 1 tsp. vanilla extract 5ml
  • 1/2 cup peanut butter 120g
  • 1/2 cup chocolate chips semi-sweet, milk chocolate, dark, white (85g)
  • 3/4 cup M&Ms 85g
  • 1/4 cup chopped nuts peanuts, walnuts, pecans, etc. (37g)

Instructions

  • Preheat the oven to 350 F/176 C.
    In a medium bowl whisk together the oats, flour, salt, and baking soda.
  • In a large bowl add both sugars and the softened room temp butter. Use a mixer and cream those ingredients together for a minute or two until it becomes a light tan color. Scrape the sides of the bowl with a spatula as needed.
  • Add in the egg and the vanilla extract and mix until just combined. Then add in the peanut butter and mix until just combined. Put the mixer away at this point. If you don't have a mixer, use a sturdy whisk or wooden spoon.
  • Now add in the dry ingredient mixture a third of it at a time, just stir it in with a spoon.
  • Stir in the chocolate chips, M&Ms, and chopped nuts. The nuts are purely optional, I like the texture it adds, and I just like nuts, to begin with.
  • Use a couple of spoons and scoop out a heaping tablespoon of cookie dough and place it on a sheet pan or cookie sheet lined with parchment paper or a silicone baking mat. Spread the cookies out about an inch or inch and a half. Bake in the oven, middle rack position, again 350 F/176 C for 10 to 14 minutes. In my oven 12 minutes is perfect.
  • The cookies will be lightly golden brown on the edges and the tops. Allow the cookies to cool 5 to 10 minutes on the pan. Then transfer them to a wire rack to cool completely. Enjoy!

Video

How to make Monster Cookies | Homemade Monster Cookies Recipe

Notes

List of nutritional facts for monster cookies

Do you like this recipe? Share and Pin it! Please give it a rating and comment down below, I really appreciate it. If you make it tag me on Instagram @inthekitchenwithmatt. Also, sign up for the newsletter so you won’t miss out on any of my new posts and recipes.

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