This simple recipe for The Best Chewy 4-Ingredient Peanut Butter Cookies is perfect for anyone who loves the classic, nutty flavor of peanut butter.

With no flour required, these flourless cookies come together in just 20–30 minutes, making them a quick and reliable choice for busy days or last-minute cravings.

They bake up chewy in the center with lightly crisp edges and store beautifully in a cookie jar or an airtight container.

Ingredients

This recipe calls for simple ingredients, found in any grocery store. Here’s how each one works together:

Creamy peanut butter: Brings the rich peanut butter flavor and chewy texture. For best results, avoid natural peanut butter as it can separate.
Brown sugar: Adds sweetness, moisture, and chewiness. It helps prevent dry, crumbly cookies.
White sugar: Balances the flavor and adds a slight crunch to the top of each cookie.
Large egg: Holds the dough together and gives structure while keeping the cookies soft.
Baking soda: Helps the cookies rise slightly, giving them just the right texture.

Take a look at the recipe card at the bottom of this post for the full recipe.

Add-ons & Substitutions

These flourless peanut butter cookies are flexible, so you can mix and match based on what you have:

Swap creamy peanut butter with crunchy peanut butter for extra texture.
Use almond butter for a peanut-free option.
Stir in chocolate chips, peanut butter chips, or chopped nuts before baking.
Add a splash of vanilla extract or maple syrup for more depth of flavor.

How to Make 4-Ingredient Peanut Butter Cookies

Start by preheating your oven to 350°F (177°C) and lining a prepared baking sheet with parchment paper. This prevents sticking and helps with even baking.

In a large bowl, mix the creamy peanut butter, brown sugar, and white sugar until the mixture is smooth. You can use a stand mixer on medium speed or stir by hand with a wooden spoon.

Add in the large egg and baking soda, mixing until the dough is fully combined. The cookie dough will be thick and sticky, which is exactly what you want.

Using a cookie scoop, portion the dough into small balls (about 1 ½ tablespoons each). Roll them into cookie balls and place them on the cookie sheet, spacing them about 2 inches apart.

If you like, flatten each cookie slightly with the tines of a fork in a criss-cross pattern. This classic look helps the cookies bake evenly and gives that familiar peanut butter cookie style.

Bake the cookies for 9–11 minutes, until the edges are set and the tops look slightly puffed. They should be golden brown but still soft in the center. Sprinkle with sea salt on top if desired.

Let them rest on the sheet pan for 5 minutes before moving them to a wire rack to cool.

Expert Tips

Use creamy peanut butter, not natural peanut butter, for the best results. The oil in natural types can cause spreading.
For chewy cookies, don’t overbake. Remove them while the centers are still slightly soft.
Line your cookie sheet with parchment paper to prevent sticking and make cleanup easier.
A cookie scoop helps keep all the cookie dough balls the same size, so they bake evenly.

Frequently Asked Questions

Are baking soda and baking powder the same?

No, baking soda and baking powder are not the same. Baking soda requires an acid to activate, whereas baking powder already contains an acid. Using the wrong one can change your cookie’s texture.

Why are my peanut butter cookies crumbling and falling apart?

Cookies may crumble if they are overbaked or if the dough has too little moisture. Measuring ingredients correctly is key to avoiding dry cookies.

What happens if I accidentally use baking powder instead of baking soda?

The cookies will still bake, but the texture will be different—denser cookies with less spread. They won’t have the same chew.

Can I use expired baking powder?

You can, but it may not work as well. Expired baking powder loses its ability to help baked goods rise. For the best results, use fresh leavening agents.

How do I store these cookies?

Place cooled cookies in an airtight container or cookie jar. They’ll stay chewy for up to 5 days at room temperature.

Can I make these ahead of time?

Yes! You can prepare the dough balls, freeze them on a cookie sheet, and transfer them to a ziplock bag. Just bake straight from frozen, adding 1–2 minutes to the baking time.