Introduction: Easy Monster Cookies

About: Hello and Welcome to In the Kitchen With Matt. I am your host Matt Taylor. My goal for the show is to teach you how to cook really good food at home for cheap. Eating out everyday can get expensive, but it doe…

In this Instructable, I will show you how to make Monster cookies. This homemade monster cookies recipe is awesome! Monster cookies are kind of a mashup or mix between several cookies, kind of like Frankensteins monster, haha. If you like chocolate chip cookies and peanut butter oatmeal cookies, and if you like M&Ms, you will love these. They are easy to make, if I can do it, you can do it. Let's get baking!

Don't forget to follow me and check out my other Instructables. :)

Follow the easy steps below or watch the short video tutorial or do both! :)

Step 1: Ingredients and Tools


  • 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)


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

Step 2: Whisk the Dry Ingredients

Preheat the oven to 350 F/176 C.

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

Step 3: Cream Butter and Sugars

In a large bowl add both sugars and the softened room temp butter. 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.

Step 4: Egg, Vanilla, and Peanut Butter

Now 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.

NOTE: If you don't have a mixer, use a sturdy whisk or wooden spoon.

Step 5: Finish the Cookie Dough

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

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

Step 6: Bake Those Cookies

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.

You should be able to get around 12 cookies on each pan, for a total of 24 cookies.

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.

Step 7: Finished Cookies!

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.

Time to dive into those monster cookies. Enjoy!

Step 8: Video Tutorial

Now check out those steps in action with this video tutorial. :)