Easy Peanut Butter Fudge

This easy peanut butter fudge comes together in one bowl with just a few pantry staples. It is rich, sweet, and smooth, with a soft texture that melts on your tongue. Because it needs no baking and only a short chill in the fridge, it works well as a quick treat or a last-minute dessert for guests.

Why You’ll Love This Recipe

• Simple ingredients: You likely have most of what you need already.
• No baking required: The fudge sets in the refrigerator rather than the oven.
• Quick to prepare: Hands-on time is about 10 minutes.
• Easy cleanup: Most of the work happens in one bowl and one pan.
• Easy to customize: Add chopped nuts, sprinkles, or a pinch of flaky salt on top.

Ingredients

• 1 cup (256 g) creamy peanut butter, smooth style (not natural-style with oil separation)
• 1/2 cup (113 g) unsalted butter
• 2 cups (240 g) powdered sugar, sifted
• 1 tsp (5 ml) vanilla extract
• 1/8 tsp (0.5 g) fine salt

Ingredient Notes

Creamy peanut butter gives the fudge its smooth texture and bold flavor. Natural-style peanut butter with a layer of oil can make the fudge greasy or soft, so stick with a stabilized creamy variety. Unsalted butter lets you control the salt level, and the pinch of salt balances the sweetness. Powdered sugar dissolves easily and gives the fudge its firm, fudgy structure.

Equipment You’ll Need

• Microwave-safe medium bowl
• 8-inch (20 cm) square baking pan
• Parchment paper
• Silicone spatula or wooden spoon
• Sharp knife

How to Make Easy Peanut Butter Fudge

1. Line the pan. Cut a sheet of parchment paper long enough to hang over two opposite sides of an 8-inch square pan. Press it in so the bottom and sides are covered. This makes the fudge easy to lift out later.
2. Melt the butter and peanut butter. Place the butter and peanut butter in the microwave-safe bowl. Microwave in 30-second intervals, stirring after each one, until the butter is fully melted and the mixture is smooth and warm. This usually takes 60 to 90 seconds in total.
3. Add the sugar. Stir in the powdered sugar, one half-cup at a time, until fully combined. The mixture will be thick and sandy at first, then become smooth and glossy as you keep stirring.
4. Season. Stir in the vanilla extract and salt until evenly blended. The fudge should hold its shape when you lift the spatula and look like thick, soft dough.
5. Press into the pan. Scrape the mixture into the prepared pan. Use the spatula or damp fingertips to press it into an even layer. Smooth the top as much as you can.
6. Chill until firm. Refrigerate for at least 1 hour, or until the fudge feels firm when you gently press the center. It may take up to 2 hours depending on your refrigerator.
7. Cut and serve. Lift the fudge out using the parchment overhang. Set it on a cutting board and slice into 16 squares with a sharp knife. Wipe the knife between cuts for cleaner edges.

Pro Tips for the Best Results

• Sift the powdered sugar to remove lumps so the fudge stays smooth.
• Stir gently after each microwave interval. Overheating can make the butter separate.
• Press the fudge in evenly so every piece sets at the same thickness.
• Let the fudge sit at room temperature for about 5 minutes before cutting if it feels too hard.
• Use a knife dipped in hot water and wiped dry for neat, clean squares.

Common Mistakes to Avoid

• Using natural peanut butter: The oil can separate and leave the fudge greasy. Choose a standard creamy style.
• Overheating the mixture: Too much heat can cause the butter to separate. Heat in short bursts and stir between them.
• Skipping the chill: Cutting too early can make the fudge crumble or smear.
• Adding sugar all at once: This can create lumps. Add it gradually and stir well.

Variations and Substitutions

• Chocolate peanut butter fudge: Sprinkle melted chocolate over the top before chilling.
• Crunchy version: Fold in 1/3 cup (45 g) chopped roasted peanuts with the vanilla.
• Salted top: Add flaky sea salt on top right after pressing into the pan.
• Lower-sugar option: Results will change, so check texture carefully if you use a powdered sugar alternative.

Serving Suggestions

Serve the fudge on a small dessert plate after dinner, or package it in small boxes as a homemade gift. It pairs well with coffee, hot cocoa, or a cold glass of milk. For a party tray, arrange it alongside fresh fruit, pretzels, and other simple sweets.

Storage and Reheating

Store the fudge in an airtight container in the refrigerator for up to 1 week. For longer storage, freeze it in a sealed container for up to 3 months, with layers separated by parchment. Thaw in the refrigerator before serving. There is no reheating step, and the fudge is best served cold or at cool room temperature.

Frequently Asked Questions

Can I make this fudge ahead of time?

Yes. You can make it up to a few days before serving and keep it chilled in an airtight container until you are ready to serve.

Why is my fudge too soft?

It likely needs more chilling time. Return it to the refrigerator for another 30 to 60 minutes. Using natural peanut butter can also cause softness.

Can I use crunchy peanut butter?

Yes, but the texture will be more grainy and less smooth. Creamy peanut butter gives the best result for this recipe.

Can I freeze peanut butter fudge?

Yes. Freeze it in a sealed container for up to 3 months and thaw in the refrigerator before cutting or serving.

Can I use salted butter?

Yes, but omit or reduce the added pinch of salt and taste the mixture before adding more.

Recipe Card: Easy Peanut Butter Fudge. Prep Time: 10 minutes. Chill Time: 1 to 2 hours. Total Time: About 2 hours. Servings: 16 squares. Course: Dessert. Cuisine: American. Cooking Method: No-bake. Nutrition information is an estimate and may vary depending on the ingredients and brands used.