4 Ingredient Oatmeal Cookies

5 Stars 4 Stars 3 Stars 2 Stars 1 Star

5 from 6 reviews

4-ingredient oatmeal cookies are a dream for quick and healthy snacking, or when you have a toddler in the house! These are the easiest way to use up brown bananas and the whole family will love them.

  • Author: Leanne Ray, MS, RDN
  • Prep Time: 5 minutes
  • Cook Time: 10 minutes
  • Total Time: 15 minutes
  • Yield: 8 cookies 1x
  • Category: Snacks
  • Method: Oven
  • Cuisine: American
  • Diet: Vegan


  • 1 large banana, mashed (the more ripe, the better!)
  • 1/4 cup peanut butter (see notes)
  • 1 cup rolled oats
  • 2 tablespoons chocolate chips


  1. Preheat oven to 350° F. Line a cookie sheet with parchment paper.
  2. Use a fork to mash the banana in a medium mixing bowl. Then add peanut butter and oats, stirring until well combined.
  3. Drop 1.5 tablespoon balls on the cookie sheet and flatten slightly with a fork (these cookies won’t change shape/size when baked). Press a few chocolate chips in each cookie.
  4. Bake for 8 minutes, then remove from oven and enjoy immediately or store in an airtight container for up to two days. 



  • The equipment section above includes affiliate links to things I use often in my kitchen and recommend.
  • Natural “drippy” peanut butter works best for this recipe to add more of a liquid component. If you only have the no-stir type, you may want to add more banana.