This keto peanut butter fudge is a dreamy treat that’s ready in just 5 minutes of prep and sets in 6 hours. With its rich, creamy texture and indulgent peanut butter flavor, it’s a guilt-free delight perfect for satisfying your sweet tooth. The recipe combines wholesome ingredients for a decadent dessert that feels luxurious yet aligns with your low-carb lifestyle.
Each bite melts in your mouth, offering a smooth, velvety experience that’s impossible to resist. The subtle sweetness and nutty richness make it an ideal snack or dessert. Whether you’re sharing with friends or enjoying solo, this fudge is a simple, no-fuss recipe that delivers big flavor with minimal effort. Plus, the 1-minute cooking time means you can whip it up anytime cravings strike!
What You’ll Need
- 1 cup creamy sugar-free peanut butter (no sugar added, or natural no sugar added)
- ½ cup (1 stick) butter (salted or unsalted both work)
- 2 teaspoons vanilla extract
- 1 cup Swerve powdered confectioners’ (sugar-free powdered sweetener)
- ¼ teaspoon salt (omit if using salted butter or salted peanut butter)
How to Make Keto Peanut Butter Fudge
- Line an 8-inch square baking pan with parchment paper, leaving enough overhang to easily remove the fudge later.
- In a medium microwave-safe bowl, combine the peanut butter and butter. Cover and microwave in 1-minute intervals until the butter is fully melted.
- Carefully remove the bowl from the microwave (it will be hot). Stir in the vanilla extract and salt (if using) until well combined.
- Add the sugar-free powdered sweetener and mix thoroughly until completely smooth and incorporated.
- Pour the mixture into the prepared pan, using the back of a spatula or spoon to smooth the top evenly.
- Cover the pan and refrigerate for at least 6 hours, or overnight, to allow the fudge to set.
- Once set, lift the fudge out of the pan using the parchment paper and place it on a cutting board. Cut into squares and enjoy!
- Store in an airtight container in the refrigerator for up to a week or in the freezer for up to three months.
Storage and Reheating Tips
This keto peanut butter fudge stores beautifully! Keep it in an airtight container in the refrigerator for up to a week. For longer storage, freeze it in a freezer-safe bag or container for up to three months. When ready to enjoy, let it thaw in the fridge for a few hours—no reheating needed!
Recipe Variations to Try
Switch things up by adding 1/4 cup of unsweetened cocoa powder for a chocolatey twist, or mix in 1/4 cup of chopped nuts for extra crunch. If you’re feeling adventurous, drizzle melted sugar-free chocolate over the top before chilling for a decadent finish.
Time-Saving Tips
To speed up the chilling process, pop the fudge in the freezer for 2-3 hours instead of the fridge. If you’re short on time, you can also use a smaller pan (like 6×6 inches) for thicker fudge that sets faster. Just remember to adjust the cutting size accordingly!
Equipment Guidance
For best results, use a microwave-safe mixing bowl and a sturdy spatula to combine the ingredients smoothly. A parchment paper-lined pan is key for easy removal, and a sharp knife or pizza cutter works wonders for clean, even squares.
Common Questions Answered
Can I use regular peanut butter?
Yes, but it will add carbs and sugar. Stick to sugar-free peanut butter to keep it keto-friendly.
What if I don’t have Swerve?
Any powdered sugar-free sweetener will work, but adjust the amount to taste, as sweetness levels vary by brand.
Keto Peanut Butter Fudge
Ingredients
- 1 cup creamy sugar-free peanut butter no sugar added, or natural no sugar added
- ½ cup butter 1 stick (salted and unsalted work)
- 2 teaspoons vanilla extract
- 1 cup Swerve powdered confectioners’
- ¼ teaspoon salt omit if using salted butter or salted peanut butter
Instructions
- Line an 8-inch square baking pan with parchment paper. Leave enough at the top to help you remove the fudge from the pan after it has set.
- Add the peanut butter and butter to a medium mixing bowl. Cover the bowl and microwave for a minute at a time, until the butter is melted.
- Remove the bowl from the microwave and add the vanilla and salt. Stir until the mixture is well combined. The bowl will be hot.
- Add the sugar-free powdered sweetener and stir until completely combined.
- Transfer the peanut butter fudge into your prepared pan, smoothing the top with the back of a spatula or spoon. Cover and chill for at least 6 hours or overnight.
- To cut the fudge, lift the parchment paper with the fudge out of the pan and place it on a cutting board before cutting into squares.
- Store in an airtight container in the refrigerator for up to a week. Store in the freezer for up to three months.