If you have a soft spot for tangy, creamy sweets that melt in your mouth, then this Key Lime Fudge Recipe is going to become your new dessert obsession. Imagine the sunny zest of key limes perfectly balanced with luscious white chocolate, creating a fudge that is refreshingly bright yet decadently smooth. It’s a delightful twist on traditional fudge, bursting with citrus flavor that will make your taste buds sing. Whether you’re serving it at a party or treating yourself after a long day, this recipe is a quick way to bring a little tropical magic into your kitchen.

Ingredients You’ll Need
What makes this Key Lime Fudge so irresistible? It’s all about simple, quality ingredients that work harmoniously to give you that perfect combination of sweet, tart, and creamy. Each element plays a crucial role in the texture and flavor, ensuring every bite feels like a little celebration.
- White chocolate chips: Use good-quality chips for a rich, velvety base that melts smoothly.
- Sweetened condensed milk: Adds sweetness while giving the fudge a creamy, fudgy texture.
- Unsalted butter: Enhances richness and helps create a glossy finish.
- Zest of 2 key limes: The secret to that signature tangy punch and fresh aroma.
- 1/3 cup key lime juice: Fresh or bottled, this adds bright acidity that balances the sweetness.
- 1/8 teaspoon salt: Just a pinch to elevate all the flavors without overpowering them.
- Optional green food coloring: For that fun, vibrant hint of green that makes the fudge feel extra festive.
- Extra lime zest for garnish: Adds a lovely visual and burst of citrus on top.
How to Make Key Lime Fudge Recipe
Step 1: Prepare Your Pan
Start by lining an 8×8-inch pan with parchment paper. This little step is a game changer because it makes lifting out your fudge effortless once it’s chilled and set. Make sure the parchment hangs over the sides to create “handles” for easy removal.
Step 2: Melt and Mix the Base
In a medium saucepan over low heat, combine the white chocolate chips, sweetened condensed milk, and unsalted butter. Stir constantly to gently melt everything together into a smooth, glossy mixture. This slow melt technique is key—it prevents burning and ensures that luscious, silky texture we all adore in fudge.
Step 3: Add the Lime Magic
Once the mixture is smooth and off the heat, quickly stir in the key lime juice, lime zest, salt, and green food coloring if you’re using it. Stir well until everything is perfectly combined and smooth. This is the moment the flavors truly come alive, as the tart lime cuts through the richness in the most delightful way.
Step 4: Chill Until Firm
Pour the luscious mixture into the prepared pan, spreading it evenly. Sprinkle extra lime zest on top for a fresh aroma and pretty finish. Then, pop it into the fridge and chill for at least 3 hours until firm. The wait might be tough, but trust me—it’s worth every minute!
Step 5: Slice and Enjoy
Once set, use the parchment overhang to lift the fudge out of the pan and transfer it to a cutting board. Cut into 36 small squares for perfect little bites of tropical bliss. Serve and watch them disappear fast!
How to Serve Key Lime Fudge Recipe

Garnishes
Adding a few sprinkles of extra lime zest or a thin slice of fresh key lime on top makes your fudge look as irresistible as it tastes. For a fun contrast, you can even dust a tiny bit of finely crushed graham crackers to nod to that classic key lime pie flavor.
Side Dishes
While fudge is often a standalone treat, pairing key lime fudge with a light, bubbly beverage like sparkling water or a citrusy cocktail elevates the whole experience. Fresh berries or a dollop of whipped cream on the side can also complement the tangy sweetness beautifully.
Creative Ways to Present
Package your fudge squares in cute gift boxes lined with tissue paper for a thoughtful homemade present. Or, arrange the squares on a decorative plate layered with edible flowers or mint leaves to add a pop of color and freshness that will wow your guests.
Make Ahead and Storage
Storing Leftovers
Key lime fudge keeps beautifully in an airtight container in the fridge for up to a week. Make sure to layer pieces separated by parchment paper to prevent sticking and maintain their perfect texture.
Freezing
If you want to enjoy this treat later, you can freeze the fudge wrapped tightly in plastic wrap and then a freezer-safe container for up to 2 months. Thaw in the fridge overnight before serving for best results.
Reheating
This fudge is best enjoyed cold or at room temperature, so reheating isn’t generally necessary. However, if you prefer a softer bite, let it sit out at room temperature for 15 to 20 minutes before enjoying.
FAQs
Can I use regular lime instead of key lime in this fudge?
Absolutely! Regular limes can substitute just fine though key limes provide a uniquely tart flavor that stands out. The difference may be subtle but it does add an authentic touch to the fudge.
Is this Key Lime Fudge Recipe gluten-free?
Yes, the recipe naturally contains no gluten ingredients and is safe for anyone avoiding gluten. Just double-check any optional add-ins like graham cracker crumbs if you use them.
Can I use white chocolate bars instead of chips?
Yes, finely chopped white chocolate bars can be used as a substitute. Just be sure to chop them finely to ensure quick and even melting.
How long does the fudge take to set?
Plan for at least 3 hours in the fridge for the fudge to completely firm up. It’s important to let it chill fully to get that perfect fudgy texture.
Can I add other flavors to this fudge?
Definitely! A splash of vanilla extract or a handful of toasted coconut flakes mix wonderfully with the key lime flavor if you want to experiment and personalize the recipe.
Final Thoughts
This Key Lime Fudge Recipe is such a gem—it’s bursting with brightness yet incredibly comforting, and it’s so easy to whip up that you’ll wonder why you hadn’t tried it sooner. Whether you’re a citrus lover or simply craving a new dessert adventure, this fudge delivers joyous flavor in every bite. Promise me you’ll give it a go soon, because once you do, I’m confident it’ll become a favorite treat to share with friends and family.
Print
Key Lime Fudge Recipe
- Prep Time: 10 minutes
- Cook Time: 5 minutes
- Total Time: 3 hours 15 minutes
- Yield: 36 small squares
- Category: Dessert
- Method: Stovetop
- Cuisine: American
- Diet: Vegetarian
Description
This Key Lime Fudge is a luscious, creamy dessert featuring smooth white chocolate combined with tangy key lime juice and zest for a refreshing citrus twist. Perfect for a make-ahead treat, it is easy to prepare on the stovetop and chilled to a firm, sliceable consistency. Bright, zesty, and beautifully balanced, this fudge is ideal for lime lovers looking for a unique dessert option.
Ingredients
Fudge Base
- 3 cups white chocolate chips
- 1 (14 oz) can sweetened condensed milk
- 2 tablespoons unsalted butter
- zest of 2 key limes
- 1/3 cup key lime juice (fresh or bottled)
- 1/8 teaspoon salt
Optional
- a few drops of green food coloring
- extra lime zest for garnish
Instructions
- Prepare Pan: Line an 8×8-inch baking pan with parchment paper to ensure easy removal of the fudge once set.
- Melt Ingredients: In a medium saucepan over low heat, combine white chocolate chips, sweetened condensed milk, and butter. Stir constantly to melt the chocolate evenly and create a smooth mixture.
- Add Flavorings: Remove the saucepan from heat. Quickly stir in the key lime juice, lime zest, salt, and optional green food coloring until fully incorporated and smooth.
- Pour Mixture: Pour the fudge mixture into the prepared pan, spreading it evenly.
- Garnish and Chill: Sprinkle extra lime zest over the top if desired, then chill the fudge in the refrigerator for at least 3 hours or until firm.
- Serve: Once set, cut the fudge into 36 small squares and serve chilled.
Notes
- If fresh key limes are unavailable, bottled key lime juice works perfectly well.
- For added texture and flavor, swirl in some graham cracker crumbs before chilling for a delightful crunch.
- Store leftover fudge in an airtight container in the refrigerator for up to one week to maintain freshness.

