Perfectly soft and chewyPeanut Butter Oatmeal Cookiesare made with simple ingredients – quick oats, peanut butter, and brown sugar – andbaked to cookie perfection. These comforting cookies are an irresistible treat that’s ready in just 30 minutes!

A white plate piled with peanut butter oatmeal cookies sits on a blue rustic table. In the background, two glasses of milk are visible, one with a cookie resting on top.

🥜 These cookies are super soft and packed with oatmeal cookie and peanut butter flavors, which I love. They are so great warm, and they store well, too! Ifoatmeal cookiesand peanut butter cookies had a baby, this would be it!

My 2 Best Tips For Making Peanut Butter Oatmeal Cookies

Let the Dough Rest:The resting period allows the oats to absorb moisture from the wet ingredients, which prevents the cookies from spreading too much during baking and creates that perfect chewy texture. Skipping this step can result in flatter, less cohesive cookies!

Watch the Baking Time Carefully:These cookies can go from perfectly golden to overbaked quickly…ask me how I know!! Look for edges that are set and lightly golden brown, but centers that still look slightly underdone. They’ll continue cooking on the hot pan after you remove them from the oven.

🩷

From start to finish, these cookies come together in about 30 minutes. The simple mixing method and quick bake time make them perfect for last-minute treats, after school snacks, or when you need to satisfy a cookie craving fast!

You probably have most of these pantry staples on hand already, plus these cookies store well, so you could make a ton and keep them for later, meal prep for the week’s lunches, or even send as a gift.

How to Make Peanut Butter Oatmeal Cookies

A food processor bowl containing a thick, light brown dough mixture pressed against the sides, viewed from above on a white countertop.

Step 1:Cream together the butter and peanut butter.

Close-up of oatmeal cookie dough being mixed in a white food processor, showing a crumbly, golden-brown texture with visible oats.

Step 2:Add the sugars, eggs, and vanilla and mix. Next, add all of the dry ingredients and stir to combine.

top view of baking sheet of oatmeal peanut butter cookie dough on a baking sheet

Step 3:Using a cookie scoop or two spoons, place a large tablespoon of dough on the baking sheet, about 3 inches apart.

A baking tray lined with parchment paper holds twelve freshly baked oatmeal cookies, with a metal spatula lifting one. Glasses and a jar of milk are seen in the background on a wooden surface.

Step 4:Bake cookies for 10-12 minutes, until the edges are set and lightly golden brown. Remove from the oven and let cool on the baking sheet for 5 minutes before removing from the sheet and placing on a wire rack to cool.

Recipe FAQs

Can I use old-fashioned oats instead of quick-cooking oats?

In oatmeal cookies, old fashioned oats will give you a chewier texture, and quick oats will result in slightly less chewy cookies, but the flavor is the same. I like using quick oats for this recipe because they break down more during baking, but you can substitute old-fashioned oats. Just pulse them in a food processor a few times to break them up slightly, or expect a more rustic texture with chewier oat pieces.

My cookies turned out too flat – what went wrong?

Flat cookies usually result from butter that’s too warm, not enough flour, or skipping the resting period. Make sure your butter is at room temperature (not melted), measure flour accurately, and don’t skip the 5-minute rest. Also, check that your baking soda is fresh.

Can I make these cookies gluten-free?

Yes! Simply substitute the all-purpose flour with your favorite gluten-free flour blend in a 1:1 ratio. Make sure to check that your oats are certified gluten-free as well, since regular oats can be cross-contaminated during processing.