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Keto Chocolate Peanut Butter Fudge

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Total Time: 4 hours 10 minutes (includes 4 hours chilling)
Active Prep Time: 10 minutes
Cook Time: 0 minutes (No-Bake)
Difficulty: Very Easy
Yield: 16 squares
Dietary Tags: Keto, Gluten-Free, Sugar-Free, Low-Carb, Vegetarian

A Decadent Low-Carb Treat You Can Make in Minutes

Craving something sweet and indulgent but committed to your keto lifestyle? This Keto Chocolate Peanut Butter Fudge is your dream come true. It combines the timeless, irresistible duo of rich chocolate and creamy peanut butter into a firm, sliceable fudge that’s incredibly satisfying. With no baking required and a mere 10 minutes of hands-on work, it’s the ultimate quick fix for dessert, a festive holiday treat, or a ready-to-go sweet snack. Each velvety square is packed with healthy fats, completely sugar-free, and contains only 2.5 grams of net carbs. Say goodbye to fudge FOMO and hello to guilt-free indulgence.

Ingredients

  • 1 cup smooth, no-sugar-added peanut butter (ensure it’s runny, not dry)

  • 4 oz (113g) full-fat cream cheese, softened to room temperature

  • ½ cup powdered erythritol (or your preferred keto-friendly confectioners’ sweetener)

  • 1 teaspoon pure vanilla extract

  • Pinch of fine sea salt

  • ¾ cup sugar-free dark chocolate chips (look for stevia-, monk fruit-, or allulose-sweetened varieties)

  • 2 tablespoons coconut oil (or unsalted butter)

Equipment Needed

  • 8×4 inch loaf pan (or a small 6×6 inch dish)

  • Parchment paper

  • Medium microwave-safe bowl

  • Large mixing bowl

  • Hand mixer or sturdy whisk

  • Spatula

Step-by-Step Instructions

Step 1: Prepare the Pan

Line your loaf pan with parchment paper, leaving some overhang on two sides. This “sling” will make it incredibly easy to lift the entire block of fudge out later for clean slicing. Set aside.

Step 2: Create the Peanut Butter Layer

  1. In the large mixing bowl, combine the softened cream cheese, smooth peanut butter, powdered erythritol, vanilla extract, and sea salt.

  2. Using a hand mixer on medium speed (or a lot of arm power with a whisk), beat the mixture for 1-2 minutes until it is completely smooth, creamy, and well combined. There should be no streaks of cream cheese.

  3. Scoop this mixture into your prepared loaf pan. Use a spatula to spread it into a smooth, even layer. Place the pan in the freezer for 20 minutes to firm up. This step is crucial for creating a distinct layered fudge.

Step 3: Make the Chocolate Topping

  1. While the peanut butter layer chills, combine the sugar-free chocolate chips and coconut oil in your microwave-safe bowl.

  2. Microwave in 30-second bursts on high power, stirring thoroughly after each burst. This usually takes 60-90 seconds total. Stop when the mixture is completely smooth and glossy. (Alternatively, you can melt this together in a double boiler over low heat.)

  3. Let the melted chocolate cool for about 2-3 minutes so it’s not piping hot.

Step 4: Combine and Set

  1. Remove the pan from the freezer. Pour the slightly cooled melted chocolate over the firmed peanut butter layer.

  2. Tilt the pan gently to help the chocolate spread into a perfect, even top layer.

  3. Immediately return the pan to the freezer. Chill for at least 4 hours, or until the fudge is completely firm throughout. For best results, you can leave it overnight.

Step 5: Slice and Serve

  1. Once fully set, use the parchment paper sling to lift the entire block of fudge out of the pan and onto a cutting board.

  2. Using a sharp knife, slice it into 16 squares (cut in half lengthwise, then 8 times crosswise). For clean cuts, you can wipe the knife with a hot, damp cloth between slices.

  3. Storage: Store the fudge squares in an airtight container in the refrigerator for up to 2 weeks. They can also be stored in the freezer for up to 3 months for a deliciously cold, almost ice-cream-like treat. Let frozen fudge sit at room temperature for 5 minutes before enjoying.

Chef’s Notes & Tips for Success

  • Sweetener Choice is Key: Powdered erythritol blends (like confectioners Swerve or Lakanto) work best as they dissolve seamlessly and don’t have a gritty texture. Granular sweeteners may not dissolve fully.

  • Peanut Butter Consistency: Use a natural, drippy peanut butter for the smoothest texture. If yours is very thick or dry, gently warm it before mixing to make it easier to blend.

  • Flavor Variations: Add a sprinkle of flaky sea salt on the wet chocolate topping for a salted fudge effect. You can also stir ¼ cup of chopped pecans or walnuts into the peanut butter layer for added crunch.

  • For a Swirl Effect: For a marbled fudge, don’t chill the peanut butter layer first. Instead, pour the melted chocolate directly over the peanut butter mixture in the pan and immediately swirl the two together with a knife or toothpick before freezing.

Nutritional Information (Per 1 Square)

  • Calories: 178 kcal

  • Total Fat: 16g

  • Saturated Fat: 6g

  • Total Carbohydrates: 7g

  • Dietary Fiber: 4.5g

  • Net Carbs: 2.5g

  • Protein: 5g

  • Sodium: 95mg

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