Keto Peanut Butter Fudge - Healthy Recipes Blog (2024)

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Last updated: · Recipes developed by Vered DeLeeuw and nutritionally reviewed by Rachel Benight MS, RD · This website generates income via ads and uses cookies.

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This wonderfully creamy and decadent keto peanut butter fudge is so delicious and very easy to make.

It's made with only six simple ingredients and contains no powdered sugar or condensed milk.

Keto Peanut Butter Fudge - Healthy Recipes Blog (1)

If you love peanut butter and creamy treats, you are going to love this recipe (and you should also try these keto fat bombs!).

Creamy, fudgy, and irresistible, it is very difficult to stop at one square!

But try: take one square out of the freezer, and savor it slowly, taking small bites and letting them melt in your mouth. If you enjoy it slowly, you'll see how satisfying it really is.

Jump to:
  • Ingredients
  • Instructions
  • Expert tip
  • Frequently asked questions
  • Variations
  • Serving suggestions
  • Storing leftovers
  • Related recipes
  • Foodie Newsletter
  • Recipe Card

Ingredients

You'll only need a few simple ingredients to make this keto peanut butter fudge. The exact measurements are included in the recipe card below. Here's an overview of what you'll need:

  • Creamy peanut butter: I use natural peanut butter. The only ingredients are peanuts and salt.
  • Unsalted butter: I'm partial to creamy European butter because it's so delicious. But any butter will be great.
  • Vanilla extract: Try to use the real thing - pure vanilla extract - and not the artificially flavored stuff. The difference in flavor is quite pronounced in uncooked recipes.
  • Sea salt: Adds an interesting layer of flavor to the fudge.
  • Sweetener: I use stevia. You could probably use a powdered sweetener instead.
  • Coconut flour: This excellent flour substitute helps to thicken and stabilize the fudge.
Keto Peanut Butter Fudge - Healthy Recipes Blog (2)

Instructions

It's ridiculously easy to make this keto peanut butter fudge! It's one of the easiest keto desserts on this website. The detailed instructions are in listed the recipe card below. Here are the basic steps:

  • You start by melting the ingredients (except for the coconut flour) over low heat.
  • Then, you whisk them until smooth. Off heat, stir in the coconut flour.
  • Transfer the mixture to a wax paper-lined pan. Freeze it for 90 minutes, then cut it into squares.
Keto Peanut Butter Fudge - Healthy Recipes Blog (3)

Expert tip

Right after making it and cutting it into squares, this fudge is a bit soft. It actually improves the next day, after an overnight stay in the fridge. So it's not a bad idea to make it the day before you plan on enjoying it.

Frequently asked questions

Why do you add coconut flour?

This fudge is made without the large amounts of powdered sugar that most fudge recipes contain because it helps stabilize and thicken them.

Instead, I use a small amount of coconut flour. Even with coconut flour, this fudge is softer than traditional ones. So depending on what texture you prefer, you might want to keep it in the freezer.

At the very least, you should keep it in the fridge, in an airtight container. Take it out right before you plan to eat it. It will soften quickly.

Can I use a peanut butter spread in this recipe?

Maybe, but I haven't tested that. I use natural peanut butter. The only ingredients are peanuts and salt, and it's the type of peanut butter that you should stir well, then refrigerate.

It's best to use a freshly opened jar when making this recipe. I find that the peanut butter at the bottom of these jars is often too dry, even if you've stirred it thoroughly.

Can I use a different sweetener?

Yes. The amount of stevia glycerite I use equals about 3 tablespoons of sugar. Make sure to use a powdered sweetener to keep the texture smooth.

Variations

I love this recipe as is and almost always make it as written. But in case you'd like to vary the basic recipe, here are a few ideas for you:

  • Add 2 tablespoons of unsweetened cocoa powder and increase the sweetener to 4 tablespoons (or ¾ teaspoon of stevia glycerite).
  • Add a pinch of cinnamon. Proceed with caution on this one! One of my kids loves this flavor combination; the rest of us are lukewarm and prefer the original version.
  • Melt a few squares of dark chocolate in the microwave (plus a teaspoon of avocado or coconut oil) and drizzle them on the mixture after it's set. Freeze again for about 30 more minutes to set the chocolate drizzle, then cut the fudge into squares.

Serving suggestions

These fudgy squares are perfect for dessert! They also work as a quick afternoon pick-me-up.

When I'm feeling extra indulgent, I top a square with a dollop of chocolate whipped cream... mmm good!

Storing leftovers

You can keep this fudge in the fridge, in an airtight container, for up to a week. Or in the freezer, in a well-sealed container, for up to three months.

Keto Peanut Butter Fudge - Healthy Recipes Blog (4)
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Recipe Card

Keto Peanut Butter Fudge - Healthy Recipes Blog (9)

4.97 from 88 votes

Pin Recipe Print Recipe

AMAZING Keto Peanut Butter Fudge

Creamy and decadent keto peanut butter fudge is delicious and very easy to make.

Prep Time10 minutes mins

Cook Time5 minutes mins

Rest time1 hour hr 30 minutes mins

Total Time1 hour hr 45 minutes mins

Course: Dessert

Cuisine: American

Servings: 25 squares

Calories: 124kcal

Author: Vered DeLeeuw

Ingredients

  • 1 ½ cups natural creamy peanut butter (24 tablespoons, 384g)
  • 6 tablespoons unsalted butter
  • 1 teaspoon vanilla extract
  • ½ teaspoon sea salt
  • ½ teaspoon stevia glycerite (equals about 3 tablespoons of sugar)
  • 2 tablespoons coconut flour

Instructions

  • Line a square 8-inch pan with wax paper.

  • In a medium saucepan over low heat, add the peanut butter, butter, vanilla, salt and stevia.

  • Whisk with a fork until smooth.

  • Remove from heat and whisk in the coconut flour.

  • Using a rubber spatula, pour the mixture into the prepared pan.

  • Cover and place in the freezer until set, at least 1 hour and preferably 90 minutes.

  • Cut into 25 squares and serve. Keep leftovers in the fridge or in the freezer, in an airtight container.

Video

Notes

  1. Right after making it and cutting it into squares, this fudge is a bit soft. It actually improves the next day, after an overnight rest in the fridge. So it's not a bad idea to make it the day before you plan on enjoying it.
  2. It's best to use a freshly opened peanut butter jar when making this recipe. I find that the peanut butter at the bottom of these jars is often too dry, even if you've stirred it thoroughly.

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Nutrition per Serving

Serving: 1square | Calories: 124kcal | Carbohydrates: 4g | Protein: 4g | Fat: 10g | Saturated Fat: 3g | Sodium: 67mg | Fiber: 2g | Sugar: 1g

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Disclaimers

Cup measurements refer to the standard American cup, which is 240 milliliters. Most of my recipes are low-carb (or keto) and gluten-free, but some are not. Please verify that a recipe fits your needs before using it. Recommended and linked products are not guaranteed to be gluten-free. Nutrition info is approximate, and the carb count excludes non-nutritive sweeteners. Nutrition info may contain errors, so please verify it independently. Recipes may contain errors, so please use your common sense when following them. Please read these Terms of Use carefully before using any of my recipes.

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More Low-Carb Desserts

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About the Author

Keto Peanut Butter Fudge - Healthy Recipes Blog (20) Vered DeLeeuw, LL.M., CNC, has been following a low-carb real-food diet and blogging about it since 2011. She's a Certified Nutrition Coach (NASM-CNC), has taken courses at the Harvard School of Public Health, and has earned a Nutrition and Healthy Living Certificate from Cornell University. Her work has appeared in several major media outlets, including Healthline, HuffPost, Today, Women's Health, Shape, and Country Living. Click to learn more about Vered.

Reader Interactions

Comments

    Leave a Comment

  1. ljc

    Keto Peanut Butter Fudge - Healthy Recipes Blog (21)
    This was great! Even though it had the stevia glycerite (which I have found leaves an aftertaste), it did not do so in this recipe. Well, maybe just a tiny bit, but not enough to affect the taste or my enjoyment of it.

    Reply

    • Vered DeLeeuw

      Wonderful! I'm so glad you enjoyed this fudge!

      Reply

Keto Peanut Butter Fudge - Healthy Recipes Blog (2024)

FAQs

Why is my peanut butter fudge not hard? ›

The amount of time you cook fudge directly affects its firmness. Too little time and the water won't evaporate, causing the fudge to be soft. Conversely, cook it too long and fudge won't contain enough water, making it hard with a dry, crumbly texture.

How many carbs in a piece of peanut butter fudge? ›

Homemade Peanut Butter Fudge (1 piece) contains 12.4g total carbs, 12.3g net carbs, 1.1g fat, 0.6g protein, and 62 calories.

What can you do if your fudge doesn't harden? ›

How can you fix soft fudge? Put it in a microwave safe bowl that is large enough that it won't boil over. Reheat it to the boiling point and cook for about 3 more minutes. Then you can beat some powdered sugar into it if this doesn't make it set.

What can I eat with peanut butter on keto? ›

You can serve nut butters on keto almond flour bread, on keto crackers, stir through keto ice cream, spread on peanut butter fudge, mix with keto maple syrup on pancakes or keto waffles.

What is the secret to good fudge? ›

Tips for Making Fudge
  • Monitor the Temperature with a Candy Thermometer. If you end up with soft fudge that turns into a puddle in your hands or hard fudge that is a bit reminiscent of a crunchy candy, improper temperature is likely to blame. ...
  • Avoid Stirring Once the Mixture Comes to a Simmer. ...
  • Beat Thoroughly.
Mar 8, 2023

Why is my peanut butter fudge dry and crumbly? ›

There are 2 reasons that fudge will crumble: overcooking & having an undissolved sugar crystal in the mixture. That undissolved crystal will cause the dissolved sugar to recrystalize (think rock candy).

Is no sugar added peanut butter low carb? ›

Peanut butter is high-fat, low-carb—unless you're buying flavored peanut butters that load up on one threat to ketosis: sugar.

How many carbs are in peanut butter for Keto? ›

Is peanut butter keto-friendly?
Smooth peanut butter ( 3 )Reduced fat peanut butter ( 6 )
Calories191166
Total carbs7 grams11 grams
Fiber2 grams2 grams
Net carbs5 grams9 grams
Aug 5, 2022

How many calories are in keto fudge? ›

There are 124 calories in 1 piece of Keto Fudge. * The % Daily Value (DV) tells you how much a nutrient in a serving of food contributes to a daily diet.

What happens if you don't boil fudge long enough? ›

Conversely, if the cooking time is too brief and there is not enough evaporation, too much water will remain and the fudge will be too soft.

What makes fudge firmer? ›

Too cooked

This fudge was cooked to a temperature of 118 °C (244 °F). At this temperature, the sugar is too concentrated and there is not enough water left to form syrup around sugar crystals. The result is hard and brittle fudge.

What is the secret to smooth fudge that is not gritty? ›

Once a seed crystal forms, it grows bigger and bigger as the fudge cools. A lot of big crystals in fudge makes it grainy. By letting the fudge cool without stirring, you avoid creating seed crystals.

Can you eat too much peanut butter on keto? ›

Limit yourself to 5 tablespoons per day on keto, measure your blood sugar and ketone levels if needed, and feel free to explore different ways to eat it. As long as you know what to look for in peanut butter, it can perfectly fit into your diet, keto or otherwise.

What jelly is keto friendly? ›

However, natural jellies may be okay to consume while on the keto diet, as long as they're made with real fruit and no added sugars or additives. Why sugar-free products are labeled as such? No. Any sweet food triggers a response to release insulin.

Why is my peanut butter fudge too soft? ›

If the fudge is very soft and slightly chewy then it is possible that it did not quite cook to soft ball stage and next time the mixture should be cooked to a slightly higher temperature (soft ball is 112-116c/235-240F and a sugar or candy thermometer can help).

Why is my peanut butter fudge still soft? ›

If there is too much evaporation, when the cooking time is too long, there will not be enough water left in the fudge and it will be too hard. Conversely, if the cooking time is too brief and there is not enough evaporation, too much water will remain and the fudge will be too soft.

How do you fix peanut butter fudge that is too soft? ›

How do you fix fudge that is too soft? Bring the fudge back to a boil with 1–2 US tbsp (15–30 ml) of cream. If your fudge is soft or runny, it probably didn't come up to a high enough temperature while it was cooking. Put it back into the saucepan and add 1–2 US tbsp (15–30 ml) of 35% fat whipping cream.

What makes my fudge too soft? ›

Undercooked. This fudge was cooked until the temperature reached only108 °C (226 °F). At this temperature, the sugar is not concentrated enough... there is too much leftover water in the syrup and the resulting fudge is soft.

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