Low-Carb Peanut Butter Cookies (Sugar-Free)


These Low-Carb Peanut Butter Cookies are a delicious, healthy way to satisfy your cookie craving! They come together in 1 bowl with only 5 ingredients for a super easy treat.

Stack of Low-Carb Peanut Butter Cookies on a cooling rack

Why you should make this recipe

If you’re like me and have a weakness for cookies, you’ll love these low-carb peanut butter cookies! They’re perfectly chewy and delicious, and you can eat more than one without overloading on sugar.

In fact, these cookies are completely sugar-free and only have 4 grams of carbs (mostly fiber) per cookie! This makes them suitable for even a ketogenic diet.

If you’ve never made these before, you’re in for a treat! The batter comes together in just 1 bowl using 5 simple ingredients. No fancy kitchen equipment is needed, just mix it all up and bake!

I recommend making these cookies at the start of the week so you have a treat ready to enjoy or share with friends and family. They will be amazed at how easy and tasty low-carb baking can be.

Ingredients

These keto peanut butter cookies call for 5 simple ingredients that you likely already have in your kitchen.

  • peanut butter: make sure to use classic peanut butter with no added sugar. Smooth, creamy peanut butter is the best in this recipe.
  • egg
  • erythritol: powdered erythritol works best in this peanut butter cookie recipe (you can blend regular erythritol or use low-carb confectioner’s sweetener)
  • baking soda
  • vanilla extract

Step-by-step instructions

You can see how I make this keto cookie recipe in this short video or read the step-by-step instructions below.

It only takes about 5 minutes to mix up the batter, and then you’ll have a delicious treat ready to be enjoyed throughout the week!

Step 1: Preheat oven to 350°F (180°C) and line a cookie sheet with parchment paper. Set aside. 

Step 2: Add the erythritol to a Nutribullet or blender and blend until powdered. Set aside. If using a confectioner’s low-carb sweetener, you can skip this step.

Step 3: Add a cup of peanut butter, egg, powdered erythritol, baking soda, and vanilla extract into a medium mixing bowl. Mix until smooth, glossy dough forms.

Ingredients mixed into a glossy cookie dough in a large glass bowl

Step 4: Roll about 2 tablespoons of cookie dough between your palms to form a ball, then place it on the prepared baking sheet. Repeat until all dough has been used. You should end up with 12-14 cookies.

Cookie dough rolled into balls on a baking sheet with a fork flattening one

Step 5: Use a fork to flatten the cookies, creating a criss-cross pattern across the top.

A tray of peanut butter cookies ready to be baked

Step 6: Bake the cookies for 12-15 minutes.

Step 7: Remove from the oven and allow to cool for 25 minutes on the baking tray, then transfer to a cooling rack for another 15 minutes.

Now your cookies are ready to be enjoyed! How easy were these 5 ingredient peanut butter cookies?!

Expert tips

Even though your cookies are going to smell amazing when you take them out of the oven, resist the urge to sample one right away! Make sure you give them the full amount of time to cool on the baking tray and the cooling rack.

Because this recipe does not contain any flour, the cooling step is crucial to allow the cookies to firm up. The longer they are able to cool, the better the texture will be. You don’t want them to fall apart when you eat them!

Be patient with these. I promise it’s worth it 🙂

Baked cookies cooling on a cooling rack

Variations

There are a few different variations for this recipe that you can try. Don’t be afraid to get creative!

  • We all know that peanut butter and chocolate are a classic combination. For a little extra sweetness, add some sugar-free chocolate chips for peanut butter chocolate cookies.
  • For a truly decadent treat, half-dip each cookie in melted sugar-free dark chocolate to make the best chocolate peanut butter cookies. This takes it to a WHOLE new level! Just be sure you allow the cookies to fully cool before dipping.
  • To give the cookies a nutty texture, try using crunchy peanut butter instead of creamy peanut butter. 
  • You can also swap out the peanut butter altogether and use different nut butter. Cashew or almond butter would work well in this recipe!

Keep in mind that the natural peanut butter will add the most taste to the cookies, but if you prefer not to use it or have an allergy, any nut butter will do.

Stack of cookies on a cooling tray

Storage

I recommend storing these keto peanut butter cookies in an airtight container in the refrigerator for up to a week. They will stay fresh, soft, and delicious!

For longer storage, you can freeze them instead and enjoy for several months.

Nutrition

This peanut butter cookie recipe is naturally gluten-free and dairy free. They are also free from any flours, making it all the more easy and practical to whip up a healthy low-carb cookie treat.

Each cookie has just 4 grams of carbs and only 2.8 grams of net carbs, making it a wonderful treat for those following a keto or low-carb diet.

Even though these are a healthier option because they are lower in carbs than traditional peanut butter cookies, it’s important to remember it is still very much a treat. Therefore, it should be enjoyed in moderation and never on an empty stomach.

Learn more: Is Peanut Butter Good for People Living with Diabetes?

Frequently asked questions

Is peanut butter keto?

Plain peanut butter is keto compliant and suitable for those following a low-carb diet. But stick to good quality peanut butter that is free from added sugars and other additives. Flavored peanut butter is not ideal as it is usually higher in carbs from added sugars and flavorings.

What is the best peanut butter for a keto diet?

Peanut butters that have only 1 or 2 ingredients are best for the keto diet. It should be plain and natural peanut butter with only peanuts and possibly salt. Chunky or creamy peanut butter are both suitable for keto and low-carb diets.

What is the best sweetener for keto cookies?

When making keto and low-carb cookies, use erythritol-based sweeteners for the best results. Erythritol is a sugar alcohol that mimics sugar in its molecular structure. This makes it a great option because it browns nicely, yielding a very crispy texture. More importantly, erythritol does not impact blood sugar at all due it its zero carb count. It is an excellent sugar substitute for people with diabetes.

Other healthy dessert recipes

I believe a healthy diet should absolutely include dessert! If you’re looking for a few more treats that you can enjoy guilt-free, check out these recipes I know you’ll love:

You can also read this roundup of my favorite 10 diabetic cookie recipes for even more delicious inspiration!

When you’ve tried these cookies, please don’t forget to let me know how you liked them and rate the recipe in the comments below!

Recipe Card

Low-Carb Peanut Butter Cookies

These low-carb peanut butter cookies are a delicious, healthy way to satisfy your cookie craving! They come together in 1 bowl with only 5 ingredients for a super easy treat.

Prep Time:5 minutes

Cook Time:15 minutes

Cooling Time:40 minutes

Total Time:1 hour

Servings:12

Instructions

  • Preheat oven to 350°F (180°C) and line a cookie sheet with parchment paper. Set aside. 

  • Skip this step if using a confectioner’s low-carb sweetener. Add the erythritol to a Nutribullet or blender and blend until powdered. Set aside. 
  • Add all of the ingredients into a medium mixing bowl and mix until a smooth, glossy dough forms.

    1 cup creamy peanut butter, 1 large egg, ⅔ cup erythritol, ½ teaspoon baking soda, ½ teaspoon vanilla extract

  • Roll about 2 tablespoons of cookie dough between your palms to form a ball, then transfer to the prepared cookie sheet. Repeat until all dough has been used. You should end up with 12-14 cookies.

  • Use a fork to flatten the cookies, creating a criss-cross pattern across the top.

  • Bake the cookies for 12-15 minutes.

  • Remove from the oven and allow to cool for 25 minutes on the baking sheet, then transfer to a cooling rack for another 15 minutes.

Recipe Notes

This recipe is for 12 cookies. Make sure you let these cookies cool completely. Because they are made without flour, the cooling process is important for them to firm up.
Variations:

  • To add chocolate, you can mix sugar-free chocolate chips into the batter or dip the cookies (once cooled) into melted sugar-free chocolate.
  • You can use crunchy peanut butter to add a nutty texture.
  • The peanut butter can be substituted with any nut butter, but keep in mind that peanut butter will add the most taste.

Storage: You can store these cookies in an airtight container in the refrigerator for up to a week or in the freezer for several months.

Nutrition Info Per Serving

Nutrition Facts

Low-Carb Peanut Butter Cookies

Amount Per Serving

Calories 140
Calories from Fat 94

% Daily Value*

Fat 10.4g16%

Saturated Fat 2.1g11%

Trans Fat 0g

Polyunsaturated Fat 2.9g

Monounsaturated Fat 5.1g

Cholesterol 15.4mg5%

Sodium 134.3mg6%

Potassium 5.8mg0%

Carbohydrates 4g1%

Fiber 1.2g5%

Sugar 0g0%

Protein 5.8g12%

Vitamin A 0IU0%

Vitamin C 0mg0%

Calcium 2mg0%

Iron 0.1mg1%

Net carbs 2.8g

* Percent Daily Values are based on a 2000 calorie diet.

Course: Snack

Cuisine: American

Diet: Diabetic, Gluten Free, Low Lactose, Low Salt, Vegan, Vegetarian

Keyword: low-carb cookies, Low-Carb Peanut Butter Cookies



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