Oatmeal Chocolate Chip Cookies are a homestead staple! My kids call these “craving cookies”. They will say, “Mom, will you make me that one cookie? I am craving it!” We all know they mean these Oatmeal Chocolate Chip Cookies… the perfect combination of rich oatmeal cookie and delicious chocolate! I’m also sharing my 50 Best Cookie Recipes!

Simply the best Oatmeal cookie ever... grandma would be proud!

Oatmeal Chocolate Chip Cookies

There is an aspect to these cookies that I love… the “secret” ingredient. It was my grandma’s recipe and she always made the BEST cookies. When I found out I was a bit shocked… but they taste so good I quickly got over it. I had never heard of adding mayonnaise to a cookie dough before, but it makes sense when you think about it. A very basic mayo consists of egg, oil, and a bit of salt. Those are common ingredients in a cookie!

Simply the best Oatmeal cookie ever... grandma would be proud!


Lots of cookie recipes contain brown sugar and there is a good reason for this. Recipes with brown sugar will absorb moisture after baking which helps to ensure that they stay chewy.

Have you ever noticed that the ratios of sugar in most cookie dough recipes are higher than other baked goods? That is because not all of the sugar dissolves during mixing, which is good! The dough will soften and spread while baking as more sugar dissolves ensuring the classic cookie shape and texture. If you happen to use less sugar than the recipe calls for your final cookie could puff up more and the texture could be less chewy.


Fats contribute not only to what a cookie tastes like but to whether the cookie keeps its shape or flattens as the fats are baked. The kind of fat you use also makes a difference. Most recipes call for butter or shortening, but this recipe has mayo. The mayo acts as the fat in this recipe and helps to create a crispy and chewy cookie.


In cookie recipes, the two most common leaveners are baking soda and baking powder. This recipe utilizes baking soda only. Baking soda is bicarbonate of soda. It neutralizes the acidity of certain ingredients in the dough, allowing the cookies to brown in the oven.


The main difference in flours found in the grocery store is the amount of protein they contain. All-purpose flour, or plain flour, is an all-around good flour to use for baking. All-purpose has a protein content of 10-13% and it consistently performs well. If you are looking for a softer, more delicate cookie you could substitute cake flour for all-purpose, but it might affect the structure of the cookie. When substituting flours it is best to use a scale, just be sure to sift flours prior to weighing. Most cookie recipes call for all-purpose flour. Bleached and unbleached flours are basically interchangeable in cookie recipes and unbleached flour is usually a better choice when you want a slightly chewier cookie.

Once you have all the basics covered, creating the perfect cookie is easy no matter what the recipe.

These cookies are perfect for one big reason… they are an amazing “base” recipe. I have used them with quick oats, with regular oatmeal, granulated sugar, butter instead of mayo, raisins instead of chocolate chips… you name it! And they always turn out perfectly.

Simply the best Oatmeal cookie ever... grandma would be proud!
4.75 from 4 votes

Oatmeal Chocolate Chip Cookies

Prep Time 15 minutes
Cook Time 12 minutes
Total Time 27 minutes
My kids call these “craving cookies”. They will say, “Mom, will you make me that one cookie? I am craving it!” We all know they mean these Oatmeal Chocolate Chip Cookies… the perfect combination of rich oatmeal cookie and delicious chocolate!


  • 1 1/2 cup firmly packed dark brown sugar
  • 3/4 cup mayo
  • 1 egg
  • 2 teaspoons vanilla extract
  • 3 cups quick-cooking oats
  • 1 cup all-purpose flour
  • 1 teaspoon ground cinnamon
  • 1/2 teaspoon baking soda
  • 1 cup semi-sweet chocolate chips


  • Preheat oven to 350°.
  • In a medium bowl beat brown sugar, mayo, egg, and vanilla for about 2 minutes. (You can use a hand-held mixer or stand mixer, but grandma recommends doing it by hand.) Set aside.
  • In a large bowl, combine oats, flour, cinnamon, and baking soda.
  • Slowly add the mayo mixture to the oat mixture and stir by hand until just combined.
  • Stir in chocolate chips. (I save a few to place on top before baking) 
  • On prepared baking sheets, drop dough by level tablespoonfuls, 3-inches apart. (they will spread some)
  • Bake 8-10 minutes or until golden.
  • Cool cookies on a wire rack.

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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. This is my first time to try in every of your recipes.
    My oat choco chip cookies turned out nothing like your photo, I followed your recipe exactly and the three cups of oats just sucked up the mayonnaise and I was left w a thick glob of flour sugar and oats. Cookies turned out overwhelmingly, cloyingsweet (like less than half a cup of sugar would’ve worked as the chips added some sweetness too). I mixed exact proportion and was left w a thick dense bowl of ingredients that didn’t flatten while baking. They also needed about 15 mins of baking time, not 8-10. I’m not a novice cook or baker but wanted to share honest feedback as now I’m reluctant to try your other beautiful recipes or waste quality ingredients on imbalanced recipes. I love your photos and creativity, thank you.

  2. Thank you so much for the recipe. I just followed it step by step (replaced mayo with butter). Cookies came out really well. It was delicious!

  3. I tried this cookie recipe and it’s too sweet for me. But definely, I’ll bake it again and make sure to reduce the sugar. Thanks for sharing.

  4. This recipe is outstanding. I had to try it. I was so curious about the mayonnaise. Thank you so much! I can’t wait to include them in care packages to our family out of state😊

  5. I just finished the Mayo choc chip oatmeal cookies and I added another egg to the recipe. They turned out really good but seemed too dry with only one egg.

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