This Old Fashioned Monster Cookie recipe is inspired by a love of eating. I also have Soft Batch Monster Cookies you will love!

Old Fashioned Monster Cookies!

I wish I had some awesome story about how my grandma made them in 1942, but yeah. It was just me tinkering away in my kitchen and putting together what I envisioned an old fashioned cookie would be like.

Old Fashioned Monster Cookies!

Seems like that today cookies are all ooey gooey and soft and loft-house style and not the crispy flakey cookies I remember as a kid.

I cannot believe I am old enough to have eaten old-fashioned food.  Old enough to want to eat old-fashioned food.

It makes sense though.  My favorite TV show is Murder, She Wrote.

Old Fashioned Monster Cookies!

Recipe based on Oatmeal Cranberry Cookies.

Tips for Success:

These cookies spread out considerably so I would press them flat(er) as you set them on the baking sheet.

If you want a higher dough to chip ratio (less chips, more cookie dough), cut the chocolate chips out and decrease peanut butter to 1/2 cup.

Make sure you cream the shortening and sugars until fluffy.  I have used both the whisk attachment and paddle and both seem to work well.

I love making these cookies into “giant” cookies, about 6-inches across.  They hold up very well and kids are absolutely giddy at the idea of the huge cookie.

Old Fashioned Monster Cookies!

These cookies are best served right out of the oven with a tall glass of cool milk! #da

Old Fashioned Monster Cookies!
5 from 1 vote

Old Fashioned Monster Cookies

Prep Time 10 minutes
Cook Time 12 minutes
Total Time 22 minutes
These Old Fashioned Monster Cookie recipe is inspired by a love of eating.


  • cups all-purpose flour
  • 1 cup peanut butter chips
  • 1 cup M&M's
  • cups whole oats
  • ¾ cup granulated sugar
  • ¾ cup brown sugar
  • ¾ cup shortening
  • 1 teaspoon McCormick® vanilla
  • 2 large eggs
  • 1 teaspoon McCormick® cinnamon
  • 1 teaspoon salt
  • 1 teaspoon baking powder
  • 1 teaspoon baking soda
  • ½ cup semi-sweet chocolate chips


  • Heat oven to 350°F.
  • In medium bowl sift flour, baking soda, baking powder, salt and cinnamon. In stand mixer or large bowl, cream together shortening, brown sugar, and white sugar until fluffy.
  • Add eggs and vanilla. Combine well.
  • Add flour mixture to wet ingredients and stir until just combined. Then add oats, M&M's, peanut butter chips and chocolate chips.
  • Use ¼ cup and scoop onto cookie sheet, you should get about 6 per sheet.
  • Bake for 8-12 minutes.

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Meet Amanda Rettke

Amanda Rettke is the creator of I Am Baker, and the bestselling author of Surprise Inside Cakes: Amazing Cakes for Every Occasion – With a Little Something Extra Inside.Over the course of her 15+ year blogging adventure, she has been featured in and collaborated with the Food Network, New York Times, LA Times, Country Living Magazine, People Magazine, Epicurious, Brides, Romantic Homes, life:beautiful, Publishers Weekly, The Daily Mail, Star Tribune, The Globe and Mail, DailyCandy, YumSugar, The Knot, The Kitchn, and Parade, to name a few.

Reader Comments

  1. Lol Amanda…Murder She Wrote…I won’t judge 🙂 I don’t think I remember ever eating these cookies…but they look fabulous and a fun weekend project for me and the munchkin.

  2. I didn’t grow up eating many desserts or cookies and I remember the first time I made and ate monster cookies. I didn’t think I would like them that much but I was so wrong. Such an amazing cookie and m&m’s rule in baked good, it turns out. : ) Your version looks great and definitely worthy of the ‘old-fashioned’ title because to me, it means good stuff!

  3. These cookies look amazing! Thick and filled with M&M’s ~ the cookie monster would be proud of these Monster Cookies!

  4. I love monster cookies! Sometimes a story isn’t necessary, especially when you have photos like yours!

  5. I’ll go ahead and pretend with you…I’ll do whatever…because these cookies are one of my faves!!

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