Craving a sweet treat but sticking to your keto goals? These Keto Peanut Butter Cookies are the answer! Imagine sinking your teeth into a soft, chewy cookie bursting with peanut butter flavor, all while staying under 3 grams of carbs. Perfect for satisfying that afternoon sweet tooth or impressing your friends with a guilt-free dessert. This recipe uses simple ingredients and comes together in minutes, making it the ultimate keto-friendly indulgence. Get ready to enjoy the taste of classic peanut butter cookies without the sugar rush!

I’ve been experimenting with keto baking for years, and peanut butter cookies are always a hit. My background in food science helps me understand how ingredients interact, resulting in the perfect texture and flavor every time. These cookies are not only delicious but also adhere strictly to keto principles, ensuring you stay on track with your dietary goals. Plus, with the renewed interest in quick and easy keto desserts, this recipe is perfectly timed for those looking to simplify their low-carb lifestyle.
Ingredients
Here’s what you’ll need to whip up these delicious keto peanut butter cookies. Each ingredient plays a crucial role in creating the perfect texture and flavor. Don’t worry if you’re missing something; I’ve included some handy substitutions to keep you baking!
- 1 cup Natural Peanut Butter: Look for peanut butter with no added sugar or oils. The natural oils in the peanut butter provide moisture and fat, which are essential for keto baking. You can substitute with almond butter or sunflower seed butter for a different flavor profile.
- ½ cup Erythritol: This is a popular keto-friendly sweetener. Erythritol doesn’t raise blood sugar levels and provides a good level of sweetness. You can also use Monk Fruit sweetener as a 1:1 replacement.
- 1 Large Egg: The egg acts as a binder and adds moisture to the cookies. If you’re egg-free, you can use a flax egg (1 tablespoon ground flaxseed mixed with 3 tablespoons of water, let sit for 5 minutes).
- 1 teaspoon Vanilla Extract: Enhances the flavor of the peanut butter and adds a touch of warmth. Feel free to experiment with other extracts like almond or maple.
- ½ teaspoon Baking Soda: Helps the cookies rise slightly and gives them a soft texture. Make sure your baking soda is fresh for the best results.
- Pinch of Sea Salt: Balances the sweetness and enhances the peanut butter flavor. Don’t skip this!
Expert Tips
After making countless batches of these cookies, I’ve learned a few tricks to guarantee perfect results every time. These tips will help you avoid common pitfalls and create truly exceptional keto peanut butter cookies.
- Use Room Temperature Ingredients: This helps the ingredients combine more easily and creates a smoother batter. Take your egg out of the fridge about 30 minutes before starting.
- Don’t Overmix: Overmixing can lead to tough cookies. Mix the ingredients until just combined.
- Chill the Dough (Optional): Chilling the dough for 30 minutes can prevent the cookies from spreading too much during baking. This is especially helpful if your kitchen is warm.
- Bake on Parchment Paper: This prevents the cookies from sticking to the baking sheet and makes cleanup a breeze.
- Watch Carefully: These cookies can burn quickly, so keep a close eye on them during the last few minutes of baking.
Storage & Substitutions
Got leftovers? Want to tweak the recipe to your liking? Here’s everything you need to know about storing your cookies and making substitutions.
- Storage: Store the cookies in an airtight container at room temperature for up to 5 days or in the refrigerator for up to 2 weeks. You can also freeze them for up to 3 months.
- Peanut Butter: As mentioned earlier, almond butter or sunflower seed butter can be used as a substitute for peanut butter. The flavor will be different, but the texture will be similar.
- Sweetener: If you don’t have erythritol or Monk Fruit, you can use another keto-friendly sweetener like Stevia, but adjust the amount according to the sweetener’s concentration.
- Add-ins: Feel free to add some sugar-free chocolate chips, chopped nuts, or a sprinkle of sea salt on top before baking for extra flavor and texture.
FAQ
Got questions? You’re not alone! Here are some of the most frequently asked questions about making keto peanut butter cookies.
Can I use a different type of nut butter?
Absolutely! Almond butter, cashew butter, or sunflower seed butter are all great alternatives to peanut butter. Keep in mind that the flavor will change slightly depending on the nut butter you choose.
Why are my cookies flat?
Flat cookies can be caused by a few factors: using too much sweetener, not chilling the dough (if the kitchen is warm), or using old baking soda. Make sure your baking soda is fresh, and try chilling the dough for 30 minutes before baking.
Can I freeze these cookies?
Yes, these cookies freeze beautifully! Place them in an airtight container or freezer bag and they’ll keep for up to 3 months. Thaw them at room temperature before enjoying.
Are these cookies really keto-friendly?
Yes, this recipe is designed to be keto-friendly. By using erythritol and natural peanut butter without added sugar, the carb count is kept very low, allowing you to enjoy a sweet treat without breaking your keto diet.
Can I add chocolate chips?
Definitely! Sugar-free chocolate chips are a fantastic addition. I recommend adding about 1/4 cup of sugar-free chocolate chips to the dough before baking.
What if I don’t have an egg?
You can use a flax egg as a substitute. Mix 1 tablespoon of ground flaxseed with 3 tablespoons of water and let it sit for 5 minutes to thicken before adding it to the recipe.
How do I know when the cookies are done?
The cookies are done when the edges are golden brown and the tops are set. They will still be slightly soft in the center, but they will firm up as they cool. Be careful not to overbake them, as they can become dry.

These Keto Peanut Butter Cookies are a game-changer for anyone following a low-carb lifestyle. With only 3 grams of carbs per cookie, you can indulge in a classic treat without the guilt. The recipe is simple, the ingredients are easy to find, and the results are absolutely delicious. So, go ahead and bake a batch of these cookies today – you won’t regret it!
Ready for more keto baking adventures? Try my Keto Chocolate Chip Cookies for another classic treat, or my Keto Almond Flour Brownies for a rich and fudgy dessert. And don’t forget to share your creations with me on social media using #KetoBaking! Also, you may be interested in my Ultimate Keto Baking Guide for more tips and tricks. If you’re looking for a quicker treat, then check out my Keto Peanut Butter Fudge.
PrintKeto Peanut Butter Cookies
Delicious keto peanut butter cookies recipe Low carb each cookie only 3g net carbs
- Prep Time: 10 minutes
- Cook Time: 12 minutes
- Total Time: 22 minutes
- Yield: 12
- Category: Dessert
- Cuisine: American
Ingredients
- 1 cup Natural Peanut Butter
- ½ cup Erythritol
- 1 Large Egg
- 1 teaspoon Vanilla Extract
- ½ teaspoon Baking Soda
- Pinch of Sea Salt
Instructions
- Use Room Temperature Ingredients: This helps the ingredients combine more easily and creates a smoother batter. Take your egg out of the fridge about 30 minutes before starting.
- Don’t Overmix: Overmixing can lead to tough cookies. Mix the ingredients until just combined.
- Chill the Dough (Optional): Chilling the dough for 30 minutes can prevent the cookies from spreading too much during baking. This is especially helpful if your kitchen is warm.
- Bake on Parchment Paper: This prevents the cookies from sticking to the baking sheet and makes cleanup a breeze.
- Watch Carefully: These cookies can burn quickly, so keep a close eye on them during the last few minutes of baking.
Notes
Craving a sweet treat but sticking to your keto goals? These Keto Peanut Butter Cookies are the answer! Imagine sinking your teeth into a soft, chewy cookie bursting with peanut butter flavor, all while staying under 3 grams of carbs.




