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Grandma's Oatmeal Chocolate Chip Cookies

Also known as “secret ingredient oatmeal cookies” because Grandma would never tell us why her Oatmeal Chocolate Chip cookies were the best!! Thankfully, she told me recently and now I am able to replicate her amazing cookies for my kids!

Prep Time
15 mins
Cook Time
15 mins
Total Time
40 mins
Servings: 12 cookies
Course: Dessert
Cuisine: American

Ingredients

  • 1 ½ cups dark brown sugar, packed
  • ¾ cup mayonnaise
  • 1 large egg, room temperature
  • 2 teaspoons vanilla extract
  • 3 cups quick-cooking oats
  • 1 cup all-purpose flour
  • 1 teaspoon ground cinnamon
  • ½ teaspoon baking soda
  • ¾ cup semi-sweet chocolate chips

Instructions

    Cup of Yum
  1. Preheat oven to 350°F.
  2. In medium bowl, beat brown sugar, mayonnaise, 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.
  3. In a large bowl, combine oats, flour, cinnamon, and baking soda.
  4. Slowly add the mayonnaise mixture to the oat mixture and stir by hand until just combined.
  5. Stir in chocolate chips.
  6. On prepared baking sheets, drop dough by level tablespoonfuls, 3-inches apart.
  7. Bake 8-10 minutes or until golden.
  8. Cool cookies on a wire rack.