This keto peanut butter fudge is rich, creamy, and comes together in one bowl with just 5 ingredients and zero baking. It’s the kind of treat that satisfies a sweet craving fast, and at roughly 2g net carbs per square, you can enjoy a piece (or two) without derailing your day.
No-Bake Keto Peanut Butter Fudge
Ingredients
Method
- Line an 8×8-inch pan with parchment paper, leaving an overhang on two sides for easy removal.
- In a microwave-safe bowl, melt the peanut butter and butter together in 30-second intervals, stirring between each, until smooth and fully combined.
- Whisk in the powdered sweetener, vanilla extract, and salt until the mixture is smooth with no lumps.
- Pour the mixture into the prepared pan and spread into an even layer.
- If using, melt the sugar-free chocolate chips and pour over the top, spreading gently to cover.
- Refrigerate for at least 2 hours, or until firm all the way through.
- Lift out using the parchment overhang, slice into squares, and serve.
Notes
Why You’ll Love This Keto Peanut Butter Fudge
It takes about 10 minutes of hands-on time, needs no oven, and uses pantry staples you probably already have. The texture is dense and creamy, similar to old-fashioned peanut butter fudge, but without the cups of sugar. It’s naturally gluten-free and easy to make dairy-free with a swap noted below.
Ingredients You’ll Need
- 1 cup natural creamy peanut butter (just peanuts and salt)
- 1/2 cup unsalted butter, softened
- 3/4 cup powdered erythritol or powdered monk fruit sweetener
- 1 teaspoon vanilla extract
- 1/4 teaspoon salt
- Optional: 1/2 cup sugar-free chocolate chips, melted, for topping
How To Make Keto Peanut Butter Fudge
- Line an 8×8-inch pan with parchment paper, leaving an overhang on two sides for easy removal.
- In a microwave-safe bowl, melt the peanut butter and butter together in 30-second intervals, stirring between each, until smooth and fully combined.
- Whisk in the powdered sweetener, vanilla extract, and salt until the mixture is smooth with no lumps.
- Pour the mixture into the prepared pan and spread it into an even layer.
- If using, melt the sugar-free chocolate chips and pour over the top, spreading gently to cover.
- Refrigerate for at least 2 hours, or until firm all the way through.
- Lift out using the parchment overhang, slice into squares, and serve.
Craving more quick chocolate fixes? Try our Keto Chocolate Mug Cake — it’s ready in 90 seconds and just 4g net carbs.
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Tips For The Best Fudge
- Use powdered sweetener rather than granular – it dissolves fully and avoids a gritty texture.
- Natural peanut butter (just peanuts and salt, no added sugar or hydrogenated oils) gives the smoothest texture and truest flavor.
- Let the fudge sit at room temperature for about 5 minutes before slicing for cleaner cuts.
- For a dairy-free version, swap the butter for coconut oil.
- Craving something savory instead? Our low carb chips are a quick savory swap.
How To Store Keto Fudge
Store the fudge in an airtight container in the refrigerator for up to 2 weeks. It also freezes well for up to 3 months – just thaw a piece at room temperature for a few minutes before eating.
Frequently Asked Questions
Is peanut butter keto-friendly?
Yes, natural peanut butter with no added sugar is keto-friendly in moderation. It’s high in healthy fats and protein with minimal net carbs per serving.
Can I use almond butter instead?
Yes, almond butter works as a 1:1 substitute if you’d like a different flavor. Note that it isn’t peanut-free, since almond butter is still a tree nut.
How many net carbs are in this fudge?
Each square has approximately 2g net carbs when made with powdered erythritol or monk fruit sweetener and unsweetened natural peanut butter. Looking for more sweets? Browse our low carb dessert recipes for more ideas.