Indulge in a guilt-free treat with these keto peanut butter cookies. Perfect for satisfying your sweet tooth while sticking to your low-carb diet, these cookies are simple to make and require just a few ingredients. Enjoy them as a snack or a dessert without compromising your keto lifestyle.
If you don't already have erythritol in your pantry, you'll need to pick some up at the supermarket. This keto-friendly sweetener is a great alternative to sugar and won't spike your blood sugar levels. Make sure to choose a smooth or chunky peanut butter that doesn't contain added sugars to keep the recipe keto-compliant.

Ingredients for Keto Peanut Butter Cookies Recipe
Peanut butter: The base of the cookies, providing a rich, nutty flavor and creamy texture.
Egg: Acts as a binder to hold the ingredients together.
Erythritol: A keto-friendly sweetener that adds sweetness without the carbs.
Vanilla extract: Enhances the flavor with a hint of vanilla aroma.
Technique Tip for This Recipe
To ensure your peanut butter cookies have a perfect texture, make sure to use room temperature ingredients. This allows the peanut butter and egg to blend more smoothly, resulting in a more cohesive dough. Additionally, when flattening the dough balls with a fork, dip the fork in a bit of erythritol to prevent sticking and to add a slight crunch to the crisscross pattern.
Suggested Side Dishes
Alternative Ingredients
peanut butter - Substitute with almond butter: Almond butter is a great keto-friendly alternative that provides a similar texture and flavor profile while being lower in carbs.
peanut butter - Substitute with sunflower seed butter: Sunflower seed butter is a nut-free option that is also low in carbs and has a similar creamy consistency.
egg - Substitute with flaxseed meal and water: Mix 1 tablespoon of flaxseed meal with 3 tablespoons of water to replace one egg. This is a good vegan and keto-friendly alternative.
erythritol - Substitute with monk fruit sweetener: Monk fruit sweetener is another keto-friendly sweetener that has zero calories and a similar sweetness level to erythritol.
erythritol - Substitute with stevia: Stevia is a natural sweetener that is also keto-friendly and can be used in smaller quantities due to its higher sweetness potency.
vanilla extract - Substitute with almond extract: Almond extract provides a different but complementary flavor that can enhance the overall taste of the cookies.
vanilla extract - Substitute with maple extract: Maple extract can add a unique and rich flavor to the cookies, making them more aromatic and flavorful.
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How to Store or Freeze These Cookies
To keep your keto peanut butter cookies fresh, store them in an airtight container at room temperature. They will stay delicious for up to one week.
If you prefer to extend their shelf life, place the cookies in the refrigerator. This will keep them fresh for up to two weeks. Ensure the container is sealed tightly to prevent any moisture from seeping in.
For longer storage, freezing is an excellent option. Arrange the cookies in a single layer on a baking sheet and place them in the freezer for about an hour. This step prevents them from sticking together.
Once the cookies are frozen solid, transfer them to a freezer-safe bag or container. Label the container with the date to keep track of their freshness. These keto treats can be stored in the freezer for up to three months.
When you're ready to enjoy a frozen cookie, simply take it out of the freezer and let it thaw at room temperature for about 15-20 minutes. Alternatively, you can warm it up in the microwave for a few seconds to enjoy a freshly baked taste.
If you prefer to freeze the cookie dough instead of the baked cookies, roll the dough into balls and place them on a baking sheet. Freeze the dough balls until solid, then transfer them to a freezer-safe bag or container. When you're ready to bake, preheat your oven and bake the frozen dough balls as directed, adding a couple of extra minutes to the baking time.
Always ensure that the cookies are completely cooled before storing them to prevent condensation, which can make them soggy.
How to Reheat Leftovers
Preheat your oven to 300°F (150°C). Place the keto peanut butter cookies on a baking sheet lined with parchment paper. Warm them for about 5-7 minutes, or until they are heated through. This method helps maintain their crisp edges and soft centers.
If you prefer a quicker method, use a microwave. Place the cookies on a microwave-safe plate and cover them with a damp paper towel. Heat on medium power for 10-15 seconds. Be cautious not to overheat, as this can make them too soft.
For a toaster oven, set it to 300°F (150°C) and place the cookies directly on the rack or on a small baking sheet. Heat for 5-7 minutes, checking frequently to ensure they don’t overcook.
If you have an air fryer, preheat it to 300°F (150°C). Place the cookies in a single layer in the basket and heat for 3-5 minutes. This method can help retain their delightful texture.
For a stovetop method, use a non-stick skillet over low heat. Place the cookies in the skillet and cover with a lid. Heat for 2-3 minutes on each side, flipping gently to avoid breaking them. This method is great for a quick reheat without drying them out.
Best Tools for This Recipe
Oven: Used to bake the cookies at the specified temperature of 350°F (175°C).
Baking sheet: A flat sheet used to place the cookie dough balls on for baking.
Parchment paper: Lining the baking sheet with this prevents the cookies from sticking and makes cleanup easier.
Mixing bowl: A large bowl used to combine the peanut butter, erythritol, egg, and vanilla extract.
Fork: Used to flatten the cookie dough balls and create a crisscross pattern on top.
Wire rack: Allows the cookies to cool completely after baking, ensuring they don't become soggy.
Measuring cups: Used to measure the peanut butter and erythritol accurately.
Measuring spoons: Used to measure the vanilla extract accurately.
Spatula: Useful for mixing the ingredients together thoroughly.
How to Save Time on Making These Cookies
Pre-measure ingredients: Measure out peanut butter, erythritol, and other ingredients ahead of time to streamline the process.
Use a cookie scoop: A cookie scoop ensures uniform dough balls and speeds up the rolling process.
Mix efficiently: Use an electric mixer to combine peanut butter, erythritol, egg, and vanilla extract quickly.
Prepare baking sheet: Line the baking sheet with parchment paper before starting to save time later.
Cool quickly: Transfer cookies to a wire rack immediately after baking to cool faster.

Keto Peanut Butter Cookies
Ingredients
Main Ingredients
- 1 cup Peanut Butter smooth or chunky
- 1 large Egg
- ½ cup Erythritol or any keto-friendly sweetener
- 1 teaspoon Vanilla Extract
Instructions
- Preheat your oven to 350°F (175°C) and line a baking sheet with parchment paper.
- In a mixing bowl, combine peanut butter, erythritol, egg, and vanilla extract. Mix until well combined.
- Roll the dough into 1-inch balls and place them on the prepared baking sheet.
- Flatten each ball with a fork, making a crisscross pattern on top.
- Bake for 12-15 minutes, or until the edges are golden brown.
- Let the cookies cool on the baking sheet for a few minutes before transferring them to a wire rack to cool completely.
Nutritional Value
Keywords
Suggested Appetizers and Main Courses for This Recipe
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