If you’re craving something sweet but don’t want to turn on the oven or make a complicated dessert, this Peanut Butter Fudge is about to become your new favorite treat. It’s ultra creamy, rich, and comes together with just a handful of pantry staples.

This recipe fits perfectly into a Keto, low carb or protein-forward lifestyle while still feeling indulgent. There’s no baking involved, minimal prep time, and the texture is smooth and satisfying—no gritty sweeteners or weird aftertaste here.

It’s also very family-friendly. Even if not everyone in your house eats keto, this fudge disappears fast. It’s great for keeping in the fridge or freezer when you want a quick treat while staying on track with your goals!

Why We Love This Recipe

Low carb and keto-friendly
Made with just 5 simple ingredients
No bake and quick to prepare
Rich, creamy texture with big peanut butter flavor
Easy to customize with add-ins
Perfect for meal prep, snacks, or desserts

Ingredients

For the recipe:

½ cup butter
¾ cup peanut butter
½ cup powdered sweetener (can use granulated - see notes)
1 teaspoon vanilla extract
Pinch of salt

Optional add-ins or toppings:

Melted keto chocolate (for swirling)
Crushed keto chocolate chips
Flaky sea salt

How to Make Keto Peanut Butter Fudge

Prepare the pan
Line an 8×8 pan or a loaf pan with parchment paper, leaving some overhang for easy removal later.
Melt the base
In a saucepan over low heat, melt the butter and peanut butter together, stirring often until completely smooth.
Mix in remaining ingredients
Remove from heat and whisk in the powdered sweetener, vanilla extract, and salt until fully combined and glossy.
Chill until set
Pour the mixture into the prepared pan and smooth it evenly. Refrigerate for 1–2 hours, or until firm.
Serve
Slice into squares and enjoy!

Nutrition Information (Approximate)

Macros will vary depending on the sweetener and peanut butter used.

Tips and Variations

Sweetener option: We don’t usually have powdered sweetener, so we’ve made this with granulated in a pinch. It is more gritty, but it didn’t bother us. If you want the smooth texture, stick with powdered. If you’re not picky, granulated works!
Protein boost: Stir in some sliced almonds! 1 Cup adds another 23 grams of protein to the bark.
Flavor variations: Swirl in melted keto chocolate or sprinkle flaky salt on top before chilling.
Storage:
- Store in the refrigerator for up to 7 days
- Freeze for longer storage and enjoy straight from the freezer

Why We Keep Making This

This Keto Peanut Butter Fudge is one of those recipes that proves low carb desserts don’t have to be complicated to be delicious. It’s quick, satisfying, and easy enough to make anytime a craving hits—perfect for busy families who want simple, real-food treats.

If you try this recipe, let us know how you customized it in the comments, and be sure to explore more easy low carb desserts here on Simple Fun Keto

Peanut Butter Fudge