3-Ingredient Peanut Butter Apple Oatmeal Cookies

These 3-ingredient peanut butter apple oatmeal cookies are soft, chewy, naturally sweet, and incredibly easy to make. With just a sweet apple, creamy peanut butter, and old-fashioned oats, you can make a simple homemade snack without flour, eggs, or a long list of ingredients.

The apple adds natural sweetness and moisture, the peanut butter makes the cookies rich and satisfying, and the oats give them a soft, hearty texture. They’re perfect when you’re craving something sweet but want to keep things simple.

Why You’ll Love This Recipe

• Only 3 main ingredients. All you need is an apple, peanut butter, and oats.
• Quick and easy. There’s no complicated dough or special baking technique.
• Naturally sweetened. A sweet apple provides natural sweetness without requiring added sugar.
• No flour or eggs. The peanut butter and apple help bind everything together.
• Easy to customize. Add cinnamon, vanilla, or a little brown sugar when you want something sweeter.
• Great for snacking. These soft oatmeal cookies make an easy afternoon snack or light dessert.

Watch how these cookies are made in the video above.

Ingredients You’ll Need

1 sweet red apple

Choose a naturally sweet apple rather than a tart variety since the apple provides the sweetness in these cookies. Peel and finely grate it before adding it to the dough.

Good choices include Gala, Fuji, or Honeycrisp.

1 cup creamy peanut butter

Creamy peanut butter gives the cookies richness and helps hold the ingredients together.

1 cup old-fashioned oats

The oats are pulsed in a blender or food processor until they resemble a coarse flour. You don’t need to grind them completely smooth.

Optional Add-Ins

The cookies are intentionally simple and lightly sweet with only the three main ingredients. If you want a little more flavor, try adding:

• Cinnamon
• Vanilla extract
• A pinch of salt
• Brown sugar for additional sweetness

How to Make 3-Ingredient Peanut Butter Apple Oatmeal Cookies

1. Preheat the oven

Preheat your oven to 350°F. Line a baking sheet with parchment paper.

2. Process the oats

Add the old-fashioned oats to a blender or food processor and pulse until they resemble a coarse flour.

Don’t worry about getting them completely powdery. A little texture is perfectly fine.

Set the oats aside.

3. Prepare the apple

Peel the apple and finely grate it.

Gently squeeze out the excess moisture from the grated apple. You don’t need to make it completely dry, but removing excess liquid helps keep the cookie dough from becoming too wet.

4. Combine the apple and peanut butter

Add the grated apple to the creamy peanut butter and stir until thoroughly combined.

5. Add the oats

Stir the pulsed oats into the peanut butter and apple mixture until a thick cookie dough forms.

6. Let the dough rest

Cover the dough and allow it to sit for about 10 minutes.

This gives the oats time to absorb some of the moisture from the apple and helps the dough firm up.

7. Shape the cookies

Scoop portions of dough and roll them gently into balls.

Arrange them on the prepared baking sheet, leaving a little space between each one.

Gently flatten the cookies before baking.

That’s important because these don’t spread like traditional butter-and-sugar cookies.

8. Bake

Bake at 350°F for 10–12 minutes.

The cookies should remain soft rather than becoming hard or deeply browned.

Allow them to cool on the baking sheet for 7–10 minutes before moving them. They’ll be delicate while they’re still hot and will firm up somewhat as they cool.

Tips for the Best Peanut Butter Apple Oatmeal Cookies

Use a sweet apple. Since there’s no added sugar in the basic recipe, the variety of apple actually matters. A sweet apple will give you a better-tasting cookie than something very tart.

Remove excess apple moisture. Too much liquid can make the dough overly wet and the finished cookies difficult to hold together.

Don’t turn the oats completely into flour. You’re looking for a coarse oat flour with some texture remaining.

Let the dough rest. Don’t skip those 10 minutes. The oats need a chance to absorb some of the moisture.

Flatten the cookies before baking. These cookies don’t spread much on their own.

Don’t overbake them. This is a soft oatmeal cookie. Baking longer in an attempt to make them crispy can dry them out.

Let them cool before moving them. They’ll be much more delicate straight from the oven.

What Do These Cookies Taste Like?

These aren’t meant to taste exactly like a traditional peanut butter cookie made with butter, flour, and sugar.

They’re soft, lightly sweet, nutty, and hearty, with natural sweetness and moisture from the apple. If you prefer a noticeably sweeter cookie, add a little brown sugar to the dough.

Can I Make Them Sweeter?

Absolutely. The basic recipe is intentionally only lightly sweet.

For a sweeter cookie, add a small amount of brown sugar to the dough. Cinnamon and vanilla are also great additions when you want more flavor without changing the basic recipe too much.

Can I Use Quick Oats?

Old-fashioned oats are my preference because you can control their texture when pulsing them yourself.

Quick oats may work, but they absorb moisture differently and can change the texture of the finished cookies. For the most consistent results, I’d stick with old-fashioned oats.

Do I Have to Grind the Oats?

For this particular recipe, I recommend it. Pulsing the oats into a coarse flour helps the ingredients combine and gives the cookies a more uniform texture.

You don’t need a perfectly fine flour—just pulse until the oats are broken down considerably.

How to Store Them

Because these cookies contain fresh apple, I would refrigerate the leftovers rather than store them on the counter for several days.

Allow the cookies to cool completely, then place them in an airtight container and refrigerate them.

For the best texture, let a refrigerated cookie sit at room temperature briefly before eating, or warm it for a few seconds in the microwave.

More Recipes to Try

If you enjoyed these cookies, here are a few more recipes you might love:

Did you make these peanut butter apple oatmeal cookies? Leave a star rating and let me know how it turned out!