This no bake protein fudge is made from just two real ingredients — peanut butter and dark chocolate — melted together and set in the fridge. No oven, no protein powder, and no special equipment. Each piece carries about 8g of protein, which makes it one of the easiest high-protein snacks you can keep on hand. Melt, pour, chill, cut — that’s genuinely the whole recipe.

The peanut butter does the protein work, and a crunchy variety leaves little peanut pieces running through every square. At 8g of protein per piece it sits right between a treat and a snack: rich enough to feel like dessert, filling enough to actually satisfy. I’ll be straight with you — this is a rich one, not a low-fat “diet” fudge. But it’s real food, it comes together in five hands-on minutes, and there’s not a scoop of powder in sight.

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Quick Recipe Overview

Prep time: 5 minutes
Set time: 2 hours (in the fridge)
Total time: ~2 hours 5 minutes
Servings: 4 pieces
Yield: 1 small tin, cut into 4
Protein: ~8 g per piece (~32 g per batch)
Calories: ~320 per piece
Dietary: Eggless · Vegetarian · No bake · No protein powder · Gluten-free*

*Check your chocolate is certified gluten-free if that matters for you.

Why You’ll Love This Recipe

Just 2 ingredients — peanut butter and dark chocolate, nothing else.
No protein powder — all 8g per piece comes from real peanut butter, so there’s no chalky aftertaste.
No oven, no equipment — one bowl, a microwave or stovetop to melt, and your fridge to set.
5 minutes hands-on — the fridge does the rest.
Naturally eggless and vegetarian — and easy to make lower-sugar with the right chocolate.
Honest about what it is — a rich, satisfying chocolate fix, not a health miracle.

Ingredients You’ll Need

(Full measurements in the recipe card below.)

Peanut butter — the protein source and the base of the fudge. Natural, unsweetened peanut butter works best; look for one where the only ingredient is peanuts (maybe salt). I use crunchy so you get little peanut pieces through every square, but smooth works too for a cleaner texture. Keep it drippy, not stiff.
Dark chocolate — melts into the peanut butter and sets the fudge firm. Good couverture or dark chocolate chips both work. The higher the cocoa percentage, the less sugar and the more intense the flavor.

Ingredient Swaps and Substitutions

Ingredient	Swap	Effect
Peanut butter	Almond butter or cashew butter	Keeps it nut-based and sets the same way — just keep it drippy, not stiff. Recommended.
Dark chocolate	Sugar-free / monk-fruit-sweetened chocolate	Lowers the sugar noticeably. Recommended if you want it less sweet.
Dark chocolate	Milk chocolate	Sweeter, softer set, more sugar. Fine, but no longer a lower-sugar treat.
Want more texture?	Fold in chopped roasted peanuts or a pinch of flaky salt on top	Adds crunch and flavor without changing the 2-ingredient base.

⚠️ Melt it slowly. The one thing that ruins this fudge is seized chocolate. Melt in 30-second bursts and stir every single time — don’t blast it all at once. The moment it’s smooth and glossy, stop. Overheated chocolate turns grainy and won’t set with a clean finish.

How to Make No Bake Protein Fudge — Step by Step

Combine peanut butter and chocolate. Add the peanut butter and chopped dark chocolate to a microwave-safe bowl. Both ingredients go in one bowl — no separate melting needed.
Melt in 30-second intervals. Microwave in 30-second bursts, stirring after each one, until smooth and glossy. This slow approach stops the chocolate from seizing. Prefer the stove? Use a double boiler. With crunchy peanut butter you’ll see the little peanut pieces come through as it melts.
Rest, then prep the tin. Set the mixture aside for a couple of minutes. Meanwhile, lightly grease a small tin or glass container with a little oil. Line with parchment if you like — optional, but it makes lifting the fudge out cleaner.
Transfer and chill. Pour the fudge into the container, smooth the top, and cover with a lid. Place in the fridge to set. Mine was firm in 2 hours.
Demould and cut. Once set, lift it out and cut into 4 pieces for about 8g of protein each. Run a knife under hot water and wipe it dry between cuts for clean edges. Store in the fridge and enjoy.

Tips for the Best Protein Fudge

Stir every 30 seconds. Chocolate seizes when it overheats. Short bursts with a stir in between keep it glossy — the difference between fudge that sets clean and fudge that turns grainy.
Use natural peanut butter. Unsweetened, natural peanut butter gives the cleanest flavor and the most protein per spoon. Crunchy adds those peanut bits you can see melting through.
Keep it in the fridge. This fudge is soft at room temperature. Store it chilled and take it out just before eating — it holds its shape best straight from the fridge.
Hot knife, clean cut. For sharp squares, dip your knife in hot water, wipe it dry, then cut — rewarming between each slice.

Common Mistakes

Fudge won’t set → Too much peanut butter relative to chocolate, or the chocolate seized while melting → Stick to the ratio in the recipe card, melt slowly, and give it the full chill time. The chocolate is what firms it, so it needs enough.
Grainy, dull texture → Chocolate overheated and seized → Melt in 30-second bursts, stirring each time; stop the moment it’s smooth.
Soft, floppy squares → Served at room temperature → This is a fridge fudge; serve it chilled.
Ragged edges → Cut with a cold, dry knife → Dip the knife in hot water and wipe dry between cuts.

Substitutions

Peanut butter → almond or cashew butter, 1:1. Effect: same set, different nutty flavor. Recommended.
Dark chocolate → sugar-free / monk-fruit chocolate, 1:1. Effect: noticeably lower sugar, same set. Recommended for a lighter treat.
Dark chocolate → milk chocolate, 1:1. Effect: sweeter and softer, more sugar. Fine.

Variations

Salted: finish with flaky sea salt before chilling.
Crunchy: fold in 2 tbsp chopped roasted peanuts.
Lower sugar: use 85%+ or monk-fruit-sweetened chocolate.
Extra protein bite: press a few extra peanuts into the top before it sets.

Storage

Method	Keeps	Notes
🧊 Fridge	1 week	Airtight container
❄️ Freezer	2 months	Rest 5 min before eating
🌡️ Room temp	Softens	Serve chilled

Nutrition Information

Nutrient	Per Piece (1 of 4)
Calories	~320 kcal
Protein	~8 g
Carbohydrates	~15 g
Total fat	~24 g
Sugar	~12 g

Estimated for 4 pieces using natural peanut butter and 57% dark chocolate. This is a rich treat — the sugar comes from the chocolate. Protein and sugar vary with the peanut butter and chocolate brands you use, so check your labels for exact numbers.

Nutrition information is an estimate and may vary depending on the brands and ingredients used.

Nutrition Value Explanation

The protein comes almost entirely from the peanut butter — no protein powder — so a higher-protein peanut butter pushes the number up. The fat is naturally high because both ingredients are fat-rich, which is what makes the fudge rich and satisfying. The sugar comes from the chocolate, so choosing a higher-cocoa or sugar-free bar is the simplest way to lower it.

Frequently Asked Questions

How much protein is in this fudge? About 8g per piece when the batch is cut into 4 — roughly 32g across the whole recipe. Almost all of it comes from the peanut butter, so a higher-protein peanut butter pushes it up. Cut into smaller pieces and the per-piece protein drops.

Do I need protein powder for this? No — there’s no protein powder at all. The protein comes entirely from the peanut butter, so there’s no chalky aftertaste. That’s the whole point of the recipe.

Can I make it lower in sugar? Yes. The sugar comes from the dark chocolate, so swapping in a sugar-free or monk-fruit-sweetened chocolate lowers it significantly. With regular dark chocolate this is a treat rather than a low-sugar snack.

Why won’t my fudge set? Usually too much peanut butter relative to chocolate, or the chocolate seized while melting. Stick to the ratio, melt slowly, and give it the full chill time. The chocolate is what firms the fudge, so it needs enough of it.

Do I need an oven? No — this is completely no bake. You only need a bowl, a microwave or stovetop to melt, and your fridge to set it.

Can I use a different nut butter? Yes — almond or cashew butter work 1:1 and set the same way. Keep whichever you use natural and drippy rather than stiff.

How should I store it? In an airtight container in the fridge for up to a week, or the freezer for up to 2 months. It’s softest at room temperature, so serve it chilled.

Is this recipe eggless and vegetarian? Yes — both ingredients are eggless and vegetarian. For dairy-free, use a dairy-free dark chocolate.

Final Thoughts

If you want a chocolate fix that gives you a little protein and takes five minutes of actual effort, this no bake protein fudge is about as easy as it gets. Two ingredients, no powder, no oven — just melt, chill, and cut. Keep a batch in the fridge and you’ll always have something to reach for.

Prefer to watch? See exactly how to melt the chocolate without it seizing, and how the fudge should look before it goes in the fridge, in my step-by-step video below.