Low Carb Peanut Butter Cookies No Flour (5 Ingredients, Chewy and Delicious)
Peanut butter is the flour in this recipe. Not a supporting ingredient, not a flavouring added to a base dough, but the entire structural component that holds the cookie together without any flour at all. Three things are needed: peanut butter, an egg and a sweetener. The peanut butter provides fat, protein and enough cohesive structure that, when baked, it firms into a cookie that holds its shape, has a slight crunch at the edge and a soft, chewy centre. This is one of the few recipes where the healthy version, made with natural peanut butter and a small amount of erythritol, is genuinely not a compromise from the conventional version. Five ingredients, twelve minutes, fourteen cookies.
Why this recipe works
Natural peanut butter, the kind containing only peanuts and salt, has a thick, viscous consistency from its natural oils that binds the other ingredients together during mixing and sets during baking into a stable structure. An egg adds protein that coagulates during baking and provides the structure that stops the cookies from spreading too flat or crumbling when cooled. Erythritol or monk fruit sweetener provides sweetness without any meaningful glycaemic impact, making these genuinely low-carbohydrate. A small amount of vanilla extract and a pinch of sea salt round out the flavour.
Getting it right
Use room temperature peanut butter that has been well stirred. Cold peanut butter does not mix evenly with the egg and produces a lumpy, inconsistent dough. Warm natural peanut butter straight from a warm spot in the kitchen is the ideal consistency.
Press the cookies flat with a fork in a crosshatch pattern before baking. The crosshatch is traditional for peanut butter cookies but also functional: it increases the surface area in contact with the baking sheet and promotes even baking and the right texture.
Common mistakes
Using commercial peanut butter with added oil and sugar produces cookies that spread too flat and taste overly sweet. Natural peanut butter with no additives is the correct starting point for this recipe.
Over-baking is very easy because the cookies look underdone when they are actually done. They will feel soft when they come out of the oven and firm up considerably as they cool. Remove when just starting to colour at the edges.
Substitutions
Almond butter produces a milder, slightly less chewy cookie. Sunflower seed butter makes these completely nut-free. A small amount of dark chocolate chips pressed onto the top of each cookie before baking adds a chocolate note and a visual finish. A teaspoon of cinnamon stirred into the dough creates a spiced variation.
Serving suggestion
Eat at room temperature, where the chewy-crisp texture is at its best. These keep in an airtight container for five days. Also excellent from the freezer after a ten-minute thaw for a firmer, more snack-like texture.
Ingredients
- 1 cup natural smooth peanut butter (Stir well before measuring, ingredients should be just peanuts and salt)
- 1 cup granulated erythritol and monk fruit sweetener blend (Such as Lakanto Golden or similar baking blend)
- 1 large egg (Room temperature)
- 1 teaspoon pure vanilla extract
- 1 teaspoon flaky sea salt (For sprinkling on top before baking)
Instructions
- 1
Preheat your oven to 175 degrees Celsius (350 degrees Fahrenheit). Line a large baking tray with parchment paper and set it aside.
Make sure the oven is fully preheated before the cookies go in. A properly hot oven helps the cookies spread just the right amount.
- 2
In a medium mixing bowl, combine the natural peanut butter and the granulated erythritol monk fruit sweetener. Stir together using a sturdy spoon or spatula until the sweetener is fully incorporated and the mixture looks uniform.
If your peanut butter has been sitting in the fridge, bring it to room temperature first. Cold peanut butter is much harder to mix and can cause the egg to seize slightly when added.
- 3
Crack the egg into the bowl and add the vanilla extract. Mix everything together until a thick, cohesive dough forms. It will look almost like a dense fudge at this point. That is exactly right.
- 4
Scoop the dough into 12 equal portions using a tablespoon or a small cookie scoop. Roll each portion briefly in your hands to form a smooth ball, then place on the prepared baking tray, spacing them about 5cm apart.
Slightly damp hands help prevent the dough sticking to your palms when rolling.
- 5
Use the back of a fork to gently press each ball down, creating the classic crosshatch pattern. Press first in one direction, then rotate the fork 90 degrees and press again. Each cookie should be around 1cm thick after pressing.
Do not press too hard. You want some thickness left in the cookie so it stays chewy rather than crunchy after baking.
- 6
Sprinkle a small pinch of flaky sea salt over the top of each cookie. Place the tray in the centre of the preheated oven and bake for 10 to 12 minutes, until the edges look set and very lightly golden.
The cookies will look underdone when you pull them out and that is intentional. They firm up significantly as they cool, so resist the urge to bake them longer.
- 7
Remove the tray from the oven and allow the cookies to cool on the tray for at least 10 minutes before attempting to move them. They are very fragile when hot. Once cooled, transfer carefully to a wire rack.
Sliding a thin spatula gently underneath each cookie makes lifting them off the parchment much easier without breaking them.
Nutrition per serving
130kcal
Calories
7g
Protein
5g
Carbs
11g
Fat
1g
Fibre
1g
Sugar
95mg
Sodium
Pro Tips
- ✓
Use only natural peanut butter with no added oils or sugar for the best texture and lowest carb count.
- ✓
Do not skip the resting time after baking. These cookies need the full 10 minutes on the tray to set up properly.
- ✓
For extra flavour depth, lightly toast the crosshatch-pressed cookies under the grill for the final 60 seconds of baking time. Watch closely as they can catch quickly.
- ✓
The dough can be slightly sticky depending on the brand of peanut butter used. A brief chill in the fridge for 10 minutes before rolling makes it much easier to handle.
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Erythritol can recrystallise slightly as cookies cool, giving them a very faint sandy texture. Using a powdered version of the sweetener or a blended monk fruit erythritol product helps minimise this.
Frequently Asked Questions
Variations
- •
Dark Chocolate Chip
Fold 3 tablespoons of 85% dark chocolate chips into the dough before shaping. The bitterness of dark chocolate works beautifully with the salty peanut butter base, and adds minimal extra carbs per cookie.
- •
Cinnamon Spice
Add half a teaspoon of ground cinnamon and a small pinch of ground cardamom to the dough. This warmth transforms the cookies into something that feels almost autumnal and pairs wonderfully with coffee.
- •
Coconut Crunch
Roll the shaped dough balls in unsweetened desiccated coconut before pressing with the fork. The coconut toasts during baking and adds a lovely chew and subtle tropical note.
- •
Espresso Boost
Dissolve half a teaspoon of instant espresso powder in the vanilla extract before adding to the dough. The coffee amplifies the roasted peanut flavour in a very satisfying way without making the cookies taste overtly like coffee.
Substitutions
- •Natural peanut butter → Natural almond butter or sunflower seed butter (Almond butter produces a slightly milder, more delicate cookie. Sunflower seed butter keeps the recipe nut-free but can sometimes turn cookies greenish after baking due to a reaction with baking soda. Since this recipe uses no baking soda, that should not be an issue here.)
- •Erythritol monk fruit blend → Coconut sugar (Coconut sugar works if you are not strictly keto. It adds a light caramel flavour but does raise the carb count to around 8g per cookie. Use the same quantity.)
- •Egg → Flax egg (1 tablespoon ground flaxseed mixed with 3 tablespoons water) (Allows the recipe to be vegan. Let the flax mixture sit for 5 minutes before using. Cookies may be slightly more fragile.)
- •Flaky sea salt → Regular fine sea salt or omit entirely (If using fine salt, reduce the quantity to just a tiny pinch as it is much more intense than flaky varieties.)
🧊 Storage
Store cooled cookies in an airtight container at room temperature for up to 4 days. Refrigerating them extends shelf life to 8 days and firms up the texture slightly. Freeze in a single layer on a tray first, then transfer to a zip-lock freezer bag for up to 2 months. Thaw at room temperature for 20 minutes before eating.
📅 Make Ahead
The dough can be made up to 3 days ahead and stored covered in the fridge. When ready to bake, allow the dough to sit at room temperature for 10 minutes to soften slightly before scooping and shaping. Baked cookies can also be frozen in batches, making them a handy grab-and-go treat anytime.
More Low-Carb Desserts Recipes
Dark Chocolate Low Carb Almond Flour Brownies with Black Bean Boost
Zesty Lemon Low Carb Coconut Flour Cookies with Chia Seeds
Lemon Herb Low Carb Cream Cheese Fat Bombs with Chia & Flaxseed
