3 Ingredient Peanut Butter Oatmeal Cookies Recipe brings soft, chewy cookies with toasty oats and bold peanut butter flavor. It suits busy bakers, kids’ snack time, and late-night cravings, and you can go from bowl to bite in about 20 minutes. I baked a batch between meetings last week and felt like a snack hero.
Why You Should Try This 3 Ingredient Peanut Butter Oatmeal Cookies Recipe
This 3 Ingredient Peanut Butter Oatmeal Cookies Recipe gives you tender, naturally sweet cookies with pantry staples and zero fuss. The dough mixes in one bowl, no mixer needed, and it uses no flour. Use certified gluten-free oats if you need a gluten-free treat.
These peanut butter oatmeal cookies taste rich and cozy, come together in minutes, and disappear even faster ★★★★★
Ingredients You’ll Need
- Ripe bananas – 2 medium, well speckled, mashed to about 1 cup (spotty bananas add more sweetness and moisture)
- Creamy peanut butter – 1 cup (no-stir brands like Jif or Skippy keep the dough consistent; natural peanut butter works if you stir well and add a tablespoon of extra oats if the dough feels loose)
- Old-fashioned rolled oats – 1 1/2 cups (use certified gluten-free oats if needed; quick oats work for a softer texture; avoid steel-cut)
Pantry-friendly extras that do not count toward the 3 ingredients:
- Pinch of kosher salt for balance
- 1 teaspoon vanilla extract for aroma
- Handful of mini chocolate chips or chopped peanuts for crunch
Equipment:
- Mixing bowl and fork or potato masher
- Sturdy spatula
- Baking sheet lined with parchment
- 1 1/2 tablespoon cookie scoop or two spoons
- Cooling rack
How to Make 3 Ingredient Peanut Butter Oatmeal Cookies Recipe
Preheat and Prep
- Heat the oven to 350°F. Line a baking sheet with parchment so the cookies release cleanly. Stir the peanut butter to smooth out any separation.
Mix the Dough
- Mash the bananas in a bowl until mostly smooth with a few small bits. Stir in the peanut butter until creamy and uniform. Fold in the oats until the mixture looks thick and scoopable.
Scoop and Flatten
- Scoop heaping tablespoons of dough onto the lined sheet, spacing them about 2 inches apart. Lightly flatten each mound with damp fingers or the back of a spoon to about 1/2 inch thick. Press on any mix-ins now if you use them.
Bake and Cool
- Bake 12 to 14 minutes until the edges look set and the tops feel dry to the touch. Pull the sheet from the oven and let the cookies rest 5 minutes on the pan. Move them to a rack and cool completely so they firm up.
Tips & Tricks
- Use very ripe bananas for the best sweetness and binding.
- Stir natural peanut butter thoroughly and add a spoon of extra oats if the dough feels runny.
- Chill the dough 10 minutes if it sticks to your scoop.
- Wet your fingers to flatten the cookies without sticking.
- Bake one test cookie to dial in exact time for your oven.
- Add a pinch of salt if your peanut butter tastes unsalted.
- Choose quick oats for a softer cookie or rolled oats for a chewier bite.
What to Serve with 3 Ingredient Peanut Butter Oatmeal Cookies Recipe
Pour a cold glass of milk or almond milk and call it snack time. Pair a warm cookie with coffee for a quick breakfast treat that still feels wholesome. Crumble a cookie over Greek yogurt with berries for a speedy parfait, or sandwich two cookies around a scoop of vanilla ice cream for a simple dessert win.
Make-Ahead and Storage
Cool the cookies fully, then store them in an airtight container at room temperature for 2 to 3 days. Keep them in the fridge up to 1 week if you like a firmer chew. Freeze the baked cookies in a zip-top bag for up to 3 months and thaw at room temp. Warm a cookie in the microwave for 10 to 12 seconds or in a 300°F oven for 3 to 4 minutes to bring back that fresh-baked feel.
3 Ingredient Peanut Butter Oatmeal Cookies Recipe
Ingredients
Instructions
- Preheat the oven to 350°F (175°C). Line a baking sheet with parchment paper. If using natural peanut butter, stir it well to combine any separated oils.
- In a mixing bowl, mash the ripe bananas with a fork until mostly smooth with just a few small bits remaining.
- Stir in the creamy peanut butter until the mixture is smooth and uniform.
- Fold in the rolled oats until the dough looks thick and scoopable. If using, add a pinch of salt, vanilla extract, and chocolate chips or chopped peanuts, and stir to combine.
- Scoop heaping tablespoons of dough onto the prepared baking sheet, spacing them about 2 inches apart.
- Lightly flatten each mound of dough to about 1/2 inch thick using damp fingers or the back of a spoon to prevent sticking.
- Bake for 12 to 14 minutes, or until the edges look set and the tops feel dry to the touch.
- Remove the baking sheet from the oven and let the cookies cool on the pan for 5 minutes to firm up.
- Transfer the cookies to a cooling rack and let them cool completely before serving or storing.
Notes
Approximate per 1 cookie (1 of 16, without optional mix-ins): 135 calories; fat 7 g; saturated fat 1.5 g; carbohydrates 15 g; fiber 2 g; sugars 6 g; protein 5 g; sodium 40 mg. Values will vary based on brands, optional ingredients, and portion size.