Keto Peanut Butter Fudge: Creamy, Easy, and Low-Carb Bliss

If you’re on the hunt for the ultimate low-carb dessert, this Keto Peanut Butter Fudge will satisfy every sweet craving without sabotaging your macros. It’s velvety, rich, and utterly indulgent—all while staying sugar-free and keto-approved. Whether you’re a peanut butter fanatic or simply want a quick dessert that won’t kick you out of ketosis, this fudge delivers. Made with wholesome, minimal ingredients, it’s an ideal make-ahead treat that feels decadent but supports your health goals.

Why This Keto Peanut Butter Fudge Is a Must-Try

There are dozens of keto dessert recipes out there, but this one stands out thanks to its creamy texture, simplicity, and satisfying flavor. Unlike many sugar-free treats, it doesn’t rely on cream cheese to create thickness. Instead, it gets its melt-in-your-mouth consistency from healthy fats and a special touch of collagen peptides. Plus, it takes just 10 minutes to make, making it perfect for busy lifestyles or last-minute dessert needs. Whether you’re following a strict ketogenic diet or just cutting sugar, this fudge is an easy win.

Essential Ingredients for Rich, Low-Carb Fudge

• Unsweetened Creamy Peanut Butter: The heart of the recipe, it provides intense flavor and a smooth, rich texture. Look for a no-stir variety for best consistency.
• Butter: Adds silky creaminess and a touch of saltiness that balances the sweetness.
• Vanilla Extract: Enhances the peanut butter flavor and adds a warm, aromatic base.
• Powdered Sweetener (like Swerve Confectioners): Ensures the fudge is sweet without being gritty. Powdered is essential for a smooth finish.
• Collagen Peptides: Boosts protein and improves texture while reducing the need for extra sweetener. Also great for skin and joint health.

Ingredient Swaps and Substitutions for Your Pantry

• Almond Butter: Swap out peanut butter if you’re allergic or simply want a flavor change. Use a smooth, unsweetened version.
• Coconut Oil: For a dairy-free version, replace butter with refined coconut oil. It adds subtle flavor and maintains structure.
• Erythritol or Monk Fruit Blend: If you can’t find Swerve, other keto-friendly sweeteners work too, though texture may vary.
• Whey Protein Powder: Use in place of collagen peptides if you’re looking to up the protein and don’t have collagen on hand.

How to Make Keto Peanut Butter Fudge: Simple and Foolproof

1. Line Your Pan
   Begin by lining a loaf pan with waxed or parchment paper. Let the paper hang over the sides so you can lift out the fudge once it’s set.
2. Melt the Base
   In a medium saucepan over low heat, combine peanut butter and butter. Stir constantly until the mixture is fully melted and smooth.
3. Add Flavor
   Remove from heat and stir in vanilla extract for added depth of flavor.
4. Mix in Sweetener and Collagen
   Whisk in powdered sweetener and collagen peptides until the mixture is well combined and glossy. Adjust sweetness to taste.
5. Chill to Set
   Pour the fudge mixture into the prepared pan and smooth the top. Refrigerate for about 1 hour, or until firm.
6. Cut and Serve
   Use the edges of the paper to lift the fudge from the pan. Slice into 15 even pieces. Store in an airtight container.

Expert Tips to Master the Perfect Fudge

• Avoid Oily Peanut Butter: If your peanut butter has oil separation, try to use the thick part only. Too much oil can result in soft, greasy fudge.
• Use Powdered Sweetener Only: Granular sweeteners can make the fudge grainy. Always opt for powdered for smooth results.
• Room Temperature for Best Texture: Although it stores well in the fridge, letting it sit at room temp for 10 minutes before serving improves flavor and creaminess.
• Don’t Skip the Lining: Proper pan lining makes cutting and serving much easier—don’t overlook this simple step.

Delicious Variations and Pairings to Explore

• Chocolate Swirl: Add a swirl of melted sugar-free chocolate for a peanut butter cup twist.
• Nutty Crunch: Stir in chopped pecans, walnuts, or peanuts before chilling for extra texture.
• Spiced Up: Add a pinch of cinnamon or cayenne pepper for an unexpected flavor kick.
• Serve with Keto Ice Cream: For a decadent dessert plate, pair your fudge with low-carb vanilla or chocolate ice cream.
• Make Ahead & Freeze: This fudge freezes beautifully. Store individual pieces in a freezer-safe bag for up to 3 months.

Collagen Power: Why It’s More Than Just Texture

Adding unflavored collagen peptides to this keto peanut butter fudge isn’t just about creating the ideal chewy texture. It’s also a smart nutritional upgrade. Collagen is known to support skin elasticity, joint strength, and gut health—benefits that complement any low-carb lifestyle. It helps balance macronutrients in a sugar-free dessert, keeping your protein intake up while minimizing carbs.

Wrapping It All Up

If you’ve been craving a rich and satisfying dessert that won’t spike your blood sugar or knock you out of ketosis, Keto Peanut Butter Fudge is your answer. This simple, no-bake recipe delivers all the creamy indulgence of traditional fudge without the guilt. Whether you’re prepping for the week, looking for a holiday treat, or just need a quick sweet fix, this fudge hits every mark—low carb, high fat, and full of peanut buttery goodness. With just a handful of ingredients and minimal effort, you can keep your dessert goals clean, easy, and truly satisfying.

Frequently Asked Questions (FAQs) Keto Peanut Butter Fudge

1. Can I freeze Keto Peanut Butter Fudge for long-term storage?
Absolutely! This fudge freezes exceptionally well. Slice it into portions, wrap them individually or place parchment between pieces, and store in an airtight container. It can last in the freezer for up to 3 months. Just thaw at room temperature for 10–15 minutes before enjoying.

2. What kind of peanut butter is best for this recipe?
Use smooth, unsweetened, no-stir peanut butter. Natural peanut butters with oil separation can make the fudge too soft or greasy. Look for brands with only peanuts and salt in the ingredients list for best results.

3. Can I make this recipe dairy-free?
Yes! Substitute the butter with refined coconut oil or a plant-based butter alternative. Keep in mind this may slightly alter the texture and flavor, but it will still yield a delicious dairy-free keto peanut butter fudge.

4. Do I need to use collagen peptides?
No, collagen is optional but recommended for its texture and health benefits. If omitted, simply increase the powdered sweetener by ¼ to ⅓ cup. This ensures the fudge still sets properly and maintains its creamy consistency.

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