Peanut Butter Fudge Recipe on Marshmallow Creme Jar: 3-Ingredient Decadence

This classic fudge recipe transforms three simple ingredients into something extraordinary. The marshmallow creme creates an impossibly smooth texture that melts in your mouth, while peanut butter adds rich, nutty depth to every bite.

With no complicated techniques or specialty equipment, this is the kind of recipe that proves exceptional results don’t require effort. Just melt, mix, and wait for the magic to happen as the mixture sets into perfect squares.

The result is a decadent treat with a velvety texture and balanced sweetness that’s hard to resist. It’s the kind of dessert that disappears quickly at gatherings or makes a thoughtful homemade gift.

Ready in under 15 minutes of active prep, this fudge delivers restaurant-quality indulgence with minimal effort. The simplicity of the process makes it perfect for beginners and experienced bakers alike.

Ingredients for Peanut Butter Fudge Recipe on Marshmallow Creme Jar

Five ingredients create velvety, melt-in-your-mouth squares with rich nutty depth and perfect sweetness.

The marshmallow creme is non-negotiable here—Jet-Puffed is the standard brand found in most supermarkets. Its fluffy, meltable texture is what gives this fudge that signature smoothness. For peanut butter, Jif or Skippy creamy are ideal; avoid natural or reduced-fat versions as they can separate. The butter should be unsalted so you control the salt content precisely.

Need to swap something? Corn syrup can replace marshmallow creme at a 1:1 ratio, though the texture will be slightly different. For a nut-free version, sunflower seed butter works but may turn green—add a teaspoon of lemon juice to prevent discoloration. Vanilla can be omitted in a pinch, but it really enhances the flavor profile.

This fudge keeps beautifully at room temperature for 1 week in an airtight container. For longer storage, refrigerate for up to 2 weeks or freeze for 3 months. Cut into squares before storing to make serving easier (worth the extra minute).

Step-by-Step Instructions for Peanut Butter Fudge on Marshmallow Creme Jar

This method delivers smooth, decadent fudge with minimal effort and maximum flavor.

Step 1: Combine Sugar, Butter, and Marshmallow Creme

In a large, heavy-bottomed saucepan, combine the 4 cups Granulated Sugar and 0.5 cup Unsalted Butter. Place over medium heat and stir constantly with a wooden spoon until the mixture comes to a full rolling boil.

Once boiling, allow it to cook undisturbed for exactly 4 minutes. The mixture will bubble vigorously and turn a light caramel color. Remove from heat immediately and stir in the 1 jar Marshmallow Creme until fully melted and smooth. This creates the base for your fudge.

Step 2: Incorporate Peanut Butter and Flavorings

Working quickly, add the 1.5 cups Creamy Peanut Butter to the hot sugar mixture. Stir vigorously until the peanut butter is completely incorporated and the mixture is homogeneous. The texture will thicken noticeably as the peanut butter melts.

Next, stir in the 1 tsp Vanilla Extract and 0.25 tsp Sea Salt. The vanilla adds depth of flavor while the sea salt balances the sweetness perfectly. Continue stirring until all ingredients are fully combined and no streaks remain.

Step 3: Pour and Set the Fudge

Line a 9×13-inch baking dish with parchment paper, leaving an overhang on all sides for easy removal. Pour the hot fudge mixture into the prepared pan, spreading it evenly with a spatula. The mixture will be thick but still pourable at this stage.

Let the fudge cool at room temperature for 1 hour before transferring to the refrigerator to set completely. This two-stage cooling prevents cracking and ensures a smooth, firm texture. The fudge is ready when it holds its shape when pressed lightly with a finger.

Step 4: Cut and Serve

Once fully set, use the parchment paper to lift the fudge from the pan. Place on a cutting board and use a sharp knife to cut into 1-inch squares. For clean cuts, dip the knife in hot water and wipe it dry between each slice.

Store the fudge in an airtight container at room temperature for up to 2 weeks, or refrigerate for longer storage. The pieces should have a glossy finish and a texture that’s firm yet melts in your mouth. Serve at room temperature for the best flavor and consistency.

Troubleshooting Perfect Results

Mixture Seizing Up

If your fudge starts to thicken too much during mixing, it’s likely because the sugar began crystallizing. Return the saucepan to low heat and stir in 1-2 tbsp hot water until smooth again. Be quick but gentle to avoid scorching.

Fudge Won’t Set

This usually means it didn’t reach the proper temperature. If after 4 hours it’s still soft, you can re-melt it and bring to a full boil for an additional 2-3 minutes. Then cool and set again. 🔥

Grainy Texture

Graininess occurs when sugar crystallizes on the pan sides. Prevent this by wiping down the pan with a damp pastry brush during boiling. If it happens, stir in 1-2 tsp corn syrup to dissolve crystals.

Too Hard or Dry

Overcooking is the culprit here. Next time, use a candy thermometer and stop at 234-240°F. For this batch, press it into the pan firmly and let it sit covered for 12 hours to soften slightly.

Oily Separation

This happens with natural peanut butter. Stick to Jif or Skippy creamy for this recipe. If it occurs, stir vigorously while warm to reincorporate, then chill immediately.

Sticking to Pan

Line your 9×13-inch baking dish with parchment paper, not just greasing it. For extra insurance, lightly butter the parchment too. This guarantees easy removal every time. ✨

Frequently Asked Questions