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Low Carb Protein Bars Recipe (Peanut Butter)
5 from 93 votes

Low Carb Protein Bars Recipe (Peanut Butter)

This recipe creates soft, peanut butter-based low-carb protein bars with a two-layer texture. The base combines peanut butter, coconut flour, protein powder, and sweetener, while the top layer includes cocoa powder for a subtle chocolate flavor. Baking until set and slightly browned yields bars that firm up when cooled, making them suitable for a low-carb snack or quick protein boost.

Prep Time
5 mins
Cook Time
25 mins
Total Time
30 mins
Servings: 8
Calories: 211 kcal
Course: Snacks
Cuisine: British

Ingredients

Base Layer
  • ½ cup / 130g peanut butter unsweetened, soft
  • 1 ½ tablespoon coconut flour
  • 1 tablespoon protein powder
  • 1 ½ tablespoon granulated sweetener
Top Layer
  • ½ cup / 130g peanut butter soft
  • 1 tablespoon cocoa powder unsweetened
  • 1 ½ tablespoon granulated sweetener
  • 1 tablespoon protein powder
  • 1 ½ tbsp coconut flour

Instructions

    Cup of Yum
  1. Preheat the oven to 175 Celsius / 350 Fahrenheit.
  2. Put the ingredients for the base and the top layer in separate bowls and mix with a fork, then knead with your hands to combine.
  3. Line an ovenproof dish with parchment paper. Spread the base layer, then add the top layer to fit a space of approximately 5 x 6 inches. 
  4. Bake for up to 25 minutes. The bars are ready when the top has set and is beginning to brown around the edges. Remove and let cool to room temperature before cutting. 

Notes

  • Use soft, stirred peanut butter for best consistency; both smooth and crunchy varieties work.
  • Allow bars to cool completely before cutting to achieve clean edges and firmer texture.
  • You can bake in a larger pan using foil dividers if a smaller size is preferred, as the batter does not spread.
  • Bars will be fragile when hot but firm up as they cool, handle with care immediately after baking.

Nutrition Information

Calories 211kcal (11%) Total Carbohydrates 5.9g (2%) Protein 11.3g (23%) Fat 15.4g (24%) Saturated Fat 2.8g (14%) Polyunsaturated Fat 6.9g (41%) Monounsaturated Fat 4.7g (24%) Fiber 3.9g (16%) Sugar 2.5g (5%)

Nutrition Facts

Serving: 8 Serving

Amount Per Serving

Calories 211

% Daily Value*

Calories 211kcal 11%
Total Carbohydrates 5.9g 2%
Protein 11.3g 23%
Fat 15.4g 24%
Saturated Fat 2.8g 14%
Polyunsaturated Fat 6.9g 41%
Monounsaturated Fat 4.7g 24%
Fiber 3.9g 16%
Sugar 2.5g 5%

* Percent Daily Values are based on a 2,000 calorie diet.