Low Carb Keto Peanut Butter Cookies Recipe

Must Try

These flourless keto peanut butter cookies are so easy to make! They require only 4 ingredients and you simply stir them together with a fork. Perfect for any low carb or keto diet. Gluten free and sugar free!

A stack of low carb peanut butter cookies on a wooden board

We’re all about back to basics today with this fabulous 4 ingredient low carb peanut butter cookies recipe!

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I regularly make these cookies and they always disappear in a flash. My whole family goes crazy for them, even my teenage carb lovers.

There are a number of reasons why you’ve got to try these keto friendly cookies ASAP – beyond the fact that they are only 1.6g net carbs per cookie.

Why you’ll love these cookies


To make this keto peanut butter cookie recipe, you need NO SPECIAL EQUIPMENT. In fact, you can mix the dough in a bowl with a fork. And then lick it (the fork). See? No labour-intensive cleaning of blenders/food processors and more fun!


5 minutes prep time and 15 minutes total time from start to finish! All ingredients go in as-is, and in any order you like. The only thing I would recommend that you keep your ingredients at room temperature.


The cookies are chewy, crunchy and taste of peanut butter. They are filling and so satisfying.

a fork pressing a criss-cross pattern on unbaked low carb Keto peanut butter cookies on a lined baking tray


Here are the ingredients you need to make these keto cookies:

PEANUT BUTTER. Always check the label! Often, brands add palm oil and sugar. Here in the UK there are several brands that sell natural peanut butter that contain only one ingredient – peanuts. Try the Meridian brand in the UK or Whole Earth in the US.

If you have a food processor, you could even make your own peanut butter. Simply blend the peanuts for a few minutes on high speed until the peanuts release their natural oils and you have a smooth butter. Add in some crushed peanuts for crunchy peanut butter.

Sugar-free SWEETENER. I used Sukrin, which is a brown sugar substitute blend made from erythritol and stevia. But really, any sweetener will work. You could choose a monk fruit sweetener such as Lakanto, xylitol, allulose or Swerve.

EGG. Use a large, room temperature egg.

SEA SALT and CINNAMON. Both are optional, but if the peanut butter does not contain salt, I recommend to sprinkle sea salt on top or mix it into the cookies.

How to make perfect keto peanut butter cookies

  1. In a mixing bowl, stir together all ingredients with a fork.
  2. Form small dough balls and place them on a parchment paper lined cookie sheet or on a silicone baking mat.
  3. Now comes the ONLY ever-so-slightly challenging part of this recipe: the creation of the pretty criss-cross pattern on top of the cookie. Wet a fork and press it onto the balls to create a cookie. Clean/wet again as you work your way through the batch. This prevents the cookie dough from sticking to the fork.
  4. Bake and enjoy! The cookies will be soft when freshly out of the oven. Patience! They firm up as they cool down.

Soft versus crunchy cookies

BAKER’S TOP TIP: If you want a cookie that’s soft in the centre, bake for around 8 minutes. If you prefer a crunchy one, leave it in the oven for 10 minutes.

low carb peanut butter cookies on a wooden board

Recipe variations

Here are ideas for recipe variations:

  • Add sugar-free chocolate chips
  • Dip one half of the cookie in melted dark chocolate (I recommend a minimum of 85% cocoa solids)
  • Use smooth peanut butter instead of crunchy
  • Add 1 teaspoon of vanilla extract
  • Use ½ teaspoon baking powder for a fluffier cookie
  • Tiger cookies: Separate the dough into two mixing bowls. Add 1 tablespoon cocoa powder to one bowl and incorporate. Then, roughly blend the two doughs together and proceed as per recipe.

Can I use different nut butters?

Yes. This recipe works with almond butter, cashew butter or any other nut or seed butter. In fact, I used it to create my 3 Ingredient Keto Almond Butter Cookies!

More peanut butter cookie variations

Sugar Free Coconut Flour Peanut Butter Cookies. Adding coconut flour or almond flour to the dough makes the cookies soft and fluffy.

Almond Flour Peanut Butter Cookies. This is another popular recipe. Almond flour adds another layer of flavor.

Keto No Bake Peanut Butter Cookies. If you leave out the egg it’s possible to create the most delicious no bake cookies.

P.S.: If you love peanut butter as much as I do, you should definitely also check out this chocolate peanut butter freezer fudge or these yummy Low Carb Peanut Butter Protein Bars. Equally simple and equally delicious.

More Keto cookie recipes:

Fun fact – did you know a peanut is not a nut but a legume? True story, but really. In my book, peanuts are welcome to live alongside almonds, pecans and the like. Let a nut be a nut.

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a stack of keto peanut butter cookies

Low Carb Keto Peanut Butter Cookies

from sugarfreelondoner.com

These flourless Keto peanut butter cookies are ready in no time at all! All you need for this super simple low carb cookie recipe are 4 ingredients.  

Prep Time 5 mins

Cook Time 10 mins

Total Time 15 mins

Course Dessert, Snack

Cuisine British

Servings 20 cookies

Calories 78 kcal

Note: The servings slider only changes the first amount in each line and not any subsequent amounts. Please make your own calculations where necessary. ***As an Amazon Associate I earn from qualifying purchases.


  • Preheat oven to 180 Celsius / 350 Fahrenheit.

  • Put all ingredients in a bowl and mix with a fork.

  • Roll small balls of dough (ca 15g each) with your hands (or use a small cookie scoop) and flatten them on a baking sheet.

  • Wet a fork and press on cookies to create a criss cross pattern.

  • Bake 8 -10 minutes, until the edges are firm. (8 minutes = soft centre, 10 minutes = overall crunchy)

  • Let cool completely before eating. They are very soft when just out of the oven, but will become crunchy once cooled.

  • Store in an airtight container.

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Try getting hold of a peanut butter that contains 100% peanuts and nothing else. If you have a food processor, you can even make your own. I mixed a bit of sea salt into the dough and sprinkled a bit more on top. It’s the salted caramel effect – sweet and salty together are just crazy good.
1.6 g net carbs per cookie. 


Calories: 78kcalTotal Carbohydrates: 2.3gProtein: 3.7gFat: 6.9gSaturated Fat: 1.1gFiber: 0.7gSugar: 1.4g

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First published in January 2018. Republished with new recipe details in May 2022.

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