Three-Ingredient Keto Peanut Butter Cookies
Soft, flourless peanut butter cookies made with just peanut butter, egg and sweetener — about 3 g net carbs per cookie.
Serves 12 (12 cookies) · Prep 5 min · Cook 10 min
Ingredients
- 250 g natural peanut butter (no added sugar)
- 1 egg
- 80 g granulated erythritol or allulose (no net carbs counted), ½ tsp vanilla, flaky salt to top
Method
- Heat the oven to 175 °C and line a tray.
- Mix the peanut butter, egg, sweetener and vanilla until smooth.
- Roll into 12 balls, flatten with a fork in a criss-cross, and sprinkle with salt.
- Bake 9–11 minutes. They look underdone but firm up as they cool. Leave on the tray for 10 minutes.
Tip. Use a peanut butter made only from peanuts and salt. "Reduced-fat" versions add sugar.
Nutrition per serving
| Nutrient | Per serving |
|---|---|
| Calories | 129 kcal |
| Fat | 10.8 g |
| Protein | 5.7 g |
| Total carbohydrate | 4.2 g |
| Fibre | 1.3 g |
| Net carbs | 2.9 g |
Calculated from USDA FoodData Central values for the weights listed; cooking fat counts 70% as eaten (our method). Seasonings are not counted. One serving is 14% of a 20 g net-carb day.
Fitting it to your macros
Need more protein? Increase the main protein ingredient by a third. Need more fat to stay full? Add butter, olive oil or avocado on the plate. The keto macro calculator gives your own daily targets, and Ketora can build a full week around recipes like this.
Frequently asked questions
How many net carbs are in three-ingredient keto peanut butter cookies?
About 2.9 g net carbs per serving (4.2 g total carbohydrate minus 1.3 g fibre), calculated from USDA data for the exact ingredient weights in this recipe.
Can I make it ahead?
It is best fresh, but leftovers keep 2–3 days in the fridge.