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Close up shot of a small round plate with many fudge squares topped with sea salt.
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5 from 1 vote

Keto peanut butter fudge

Soft with a creamy texture, this easy keto peanut butter fudge recipe is a low carb and gluten-free treat that is full of healthy fats and protein. It's perfect as a post work-out snack or just a sweet bite that you can enjoy with a cup of coffee.
Prep Time5 mins
Cook Time5 mins
Freezing1 hr
Total Time1 hr 10 mins
Course: Dessert, Snack
Cuisine: American
Keyword: Gluten-free fudge, Keto fudge, Keto snacks, Protein snacks
Servings: 14 pieces
Calories: 164kcal
Author: Anna


  • loaf pan 9”x 5” x 3” (25cm x 11.5cm x 7cm)


  • ½ cup 113g unsalted butter
  • cup 65g granulated sweetener such as Sukrin
  • 1 cup 240g creamy peanut butter, unsweetened
  • Pinch of salt
  • 1 teaspoon vanilla extract
  • 2 tablespoon 10g whey protein powder, unflavored


  • Prepare a loaf pan (9”x 5” x 3”/25cm x 11.5cm x 7cm) by lining it with parchment paper. Set aside.
  • Add the butter and sweetener into a medium saucepan. Heat over a medium heat until the butter has melted and the sweetener has dissolved completely. Remove from the heat.
  • Add the peanut butter, salt, and vanilla extract and mix with a whisk or a spatula until well combined.
  • Add the protein powder, mix again, and pour into the loaf pan. Freeze for 1-2 hours or until completely set.
  • Remove from the freezer and the loaf pan and cut into 14-16 even cubes. Serve.



Store in an air-tight container in the fridge for up to 1 week.
Freeze in an air-tight container for up to 2 months. Thaw overnight in the fridge before serving.


Serving: 1piece | Calories: 164kcal | Carbohydrates: 4g | Protein: 4g | Fat: 15g | Potassium: 98mg | Fiber: 1g | Sugar: 2g | Vitamin A: 202IU | Calcium: 10mg