These 3-ingredient peanut butter oatmeal cookies are chewy, rich, and made with pantry staples. No flour, no eggs, and ready in minutes.
Why These 3-Ingredient Peanut Butter Oatmeal Cookies Turn Out Chewy With Crisp Edges
Some days call for a simple bake that doesn't require measuring ten ingredients or pulling out the mixer. That's exactly why I keep coming back to these peanut butter oat cookies. They come together in one bowl, hold their shape beautifully, and bake into thick, chewy cookies with crisp edges.
I use old-fashioned rolled oats because they give these old-fashioned rolled oats cookies a rustic bite you don't get from quick oats. The brown sugar keeps them soft, while the peanut butter gives structure and depth. If you're looking for easy 3-ingredient cookies that taste like real cookies, not a compromise, this version works every time.
Why You'll Love It
- Just 3 Pantry Ingredients: These 3-ingredient peanut butter oatmeal cookies are simple, approachable, and require no flour or special additions.
- Perfectly Chewy Texture: The brown sugar and old-fashioned rolled oats create chewy peanut butter oatmeal cookies with lightly crisp edges.
- Quick and Reliable: These peanut butter oat cookies mix in one bowl, bake in minutes, and hold their shape beautifully every time.
Key Ingredients in 3-Ingredient Peanut Butter Oatmeal Cookies
You'll find the exact measurements in the recipe card, but here's a closer look at key ingredients and why I use them.
- Peanut Butter: I use creamy peanut butter as the base because it binds everything together and gives these no-flour peanut butter oatmeal cookies their structure.
- Brown Sugar: Brown sugar keeps the texture soft and helps create that chewy peanut butter oatmeal cookie center.
- Old Fashioned Rolled Oats: I prefer rolled oats since they add texture and make these peanut butter oat cookies hearty and satisfying.
How to Make 3-Ingredient Peanut Butter Oatmeal Cookies
You can find the complete printable recipe with measurements below, but for now, here's a quick overview of how it goes:
1. Combine the Base Ingredients: Mix the peanut butter and brown sugar in a bowl until smooth and fully combined.
2. Add the Rolled Oats: Stir in the rolled oats until evenly incorporated, and a thick dough forms.
3. Shape the Cookies: Scoop the dough onto a lined baking sheet, spacing about 2 inches apart, then gently flatten each cookie.
4. Bake and Cool: Bake at 350°F / 180°C (320°F convection / 160°C fan) for 10-12 minutes until lightly golden, cool 5 minutes on the tray, then transfer to a rack to cool completely.
My Tips for Recipe Success
Flatten Before Baking: These cookies don't spread much on their own, so I gently press them to the thickness I want before they go into the oven.
Avoid Overbaking: If you want softer centers, remove them closer to 10 minutes. They firm up as they cool.
Storage
Store these peanut butter oat cookies in an airtight container at room temperature for up to 4 days. They also freeze well for up to 2 months.
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Recipe
3-Ingredient Peanut Butter Oatmeal Cookies
Ingredients
- 250 g creamy peanut butter
- 100 g brown sugar
- 80 g old-fashioned rolled oats
Instructions
- Preheat your oven to 350°F / 180°C (320°F convection / 160°C fan). Line a baking sheet with parchment paper.
- In a medium bowl, mix 1 cup creamy peanut butter and ½ cup brown sugar until smooth and fully combined.
- Stir in 1 cup old-fashioned rolled oats until evenly incorporated and a thick dough forms.
- Scoop 1 tablespoon portions of dough and place them onto the prepared baking sheet, spacing them about 2 inches apart.
- Gently flatten each cookie slightly with the back of a spoon or your fingers.
- Bake for 10-12 minutes, until the edges look set and lightly golden.
- Let the cookies cool on the baking sheet for 5 minutes, then transfer to a wire rack to cool completely.
Notes
Nutrition
Nutritional information is based on third-party calculations and should be considered an estimate only. Actual nutritional content will vary based upon brands used, measuring methods, cooking method, portion sizes, and more.
Pauline says
These peanut butter oatmeal cookies were surprisingly good for just three ingredients, I’m making them again.