Three-Ingredient Peanut Butter Cookies

These Three-Ingredient Peanut Butter Cookies are one of those wonderfully simple recipes worth keeping close. With nothing more than peanut butter, sugar, and an egg, they bake into cookies with rich roasted-peanut flavor, lightly crisp edges, and soft, tender centers. There is no flour, butter, or complicated mixing involved, so the peanut butter really gets to be the star.

I especially like this recipe for beginner bakers and busy afternoons because the dough comes together in one bowl and doesn’t require a mixer. The classic fork-made crisscross tops give them that familiar homemade peanut butter cookie look, while a short baking time keeps the centers from becoming dry and crumbly. Chilling the dough isn’t required, but it can make the cookies easier to shape.

They’re naturally flourless, easy enough for kids who are learning to bake, and ready in about 30 minutes. Just keep an eye on those last couple of minutes in the oven; these cookies are at their best when they still look slightly soft as they come out.

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Ingredients

1 cup peanut butter

1 cup granulated sugar

1 large egg

Instructions

1. Preheat the oven to 175°C / 350°F. Line a baking sheet with parchment paper.
2. Combine the peanut butter, sugar, and egg in a medium bowl. Stir until the dough is smooth and evenly mixed.
3. For easier shaping, chill the dough briefly if it feels especially soft or sticky.
4. Roll the dough into 12 balls, about 1 inch each, and arrange them about 1 inch apart on the prepared baking sheet.
5. Gently press each ball with the tines of a fork, then press again in the opposite direction to create the traditional crisscross pattern.
6. Bake for 6-8 minutes, until the bottoms are barely golden and the centers still appear slightly soft. Avoid overbaking, which can make flourless peanut butter cookies dry and crumbly.
7. Let the cookies rest on the baking sheet for several minutes so they can firm up. Carefully transfer them to a wire rack and cool completely before serving.

Cooking Notes

These cookies are very soft when hot, so don’t try to move them immediately after baking. They become sturdier as they cool.

For the most predictable texture, use a smooth, well-stirred peanut butter. Natural peanut butter with significant oil separation may produce a softer or more fragile dough.

The cookies should be only lightly colored underneath when removed from the oven. If you wait for the tops to look fully browned, they may be overbaked.

For a less sweet cookie, the sugar can be reduced slightly, although a substantial reduction will change both the spread and texture because sugar provides structure as well as sweetness.

If gluten avoidance is medically necessary, verify that the peanut butter and other packaged ingredients are certified or otherwise confirmed gluten-free.

Nutrition

The recipe makes approximately 12 cookies, with one cookie considered one dessert serving. Estimated nutrition is based on a batch made with about 1 cup peanut butter, 1 cup granulated sugar, and one large egg.

Estimated Nutrition per Serving

Calories: 197 kcal
Fat: 11.2 g
Carb: 21.4 g
Protein: 5.2 g

Recipe Science

These flourless cookies rely on peanut butter for both fat and much of their structure. The egg contributes proteins that set during baking, while sugar provides sweetness, promotes browning, and affects how the dough spreads. Because there is no flour, the finished cookie is generally more tender and somewhat more fragile than a conventional peanut butter cookie.

During the brief bake, egg proteins coagulate while moisture evaporates and the sugar and peanut butter help create a lightly browned exterior. The cookies continue setting from residual heat after leaving the oven, which is why removing them when the centers still look slightly soft helps prevent a dry, crumbly result. Chilling soft dough can also make portioning and shaping easier.

For everyday storage, cool the cookies completely before placing them in an airtight container. Their short ingredient list also makes the basic formula easy to modify, although changes to peanut butter type, egg size, or sugar quantity can noticeably affect texture.

Dietary Notes & Health Alerts: The primary nutritional consideration is added sugar. One cookie contains roughly 17 g of added sugar, approximately 34% of the FDA Daily Value of 50 g, qualifying as High per serving. Someone limiting added sugar may want to treat one cookie as the serving rather than doubling up. Saturated fat is estimated below the 20% Daily Value threshold per cookie, although the exact amount depends on the peanut butter used. Sodium can also vary significantly by brand; choosing unsalted or lower-sodium peanut butter can reduce it.

Why You’ll Love This Recipe

• Only Three Ingredients: Peanut butter, sugar, and an egg are all you need for the basic dough.
• Beginner-Friendly: One bowl and straightforward mixing make this an approachable first cookie recipe for young bakers.
• Big Peanut Butter Flavor: With no flour or butter competing for attention, peanut butter provides the dominant flavor.
• Fast Baking: The cookies need only about 6-8 minutes in the oven.
• Naturally Flourless: No flour is required, making the recipe convenient when the pantry is running low.

FAQ

• Can I use natural peanut butter? Yes, but stir it extremely well first. Very runny, oil-separated peanut butter can make the dough softer and the cookies more fragile.
• Why did my cookies turn out crumbly? Overbaking is the most likely culprit. Remove them when the bottoms are just beginning to brown, then allow them to finish setting on the hot baking sheet.
• Do I need to chill the dough? No. However, a short chill can make particularly soft or sticky dough much easier to roll.
• Can I make the dough ahead of time? Yes. Cover and refrigerate it, then allow it to soften briefly if it becomes too firm to portion comfortably.
• Why are the cookies so soft when they come out? That’s normal. Without flour, their structure is particularly delicate while hot. Let them sit on the baking sheet for several minutes before transferring them.

Conclusion

These three-ingredient peanut butter cookies prove that a homemade treat doesn’t need a long ingredient list to be satisfying. Cooking is always a little journey, so don’t be afraid to adjust the recipe over time until it becomes just right for your family.

Would you keep these classic, or add something like chocolate chips next time? Happy baking!