Key Lime Fudge
Indulging in a piece of creamy, citrus-infused Key Lime Fudge is like taking a bite of sunshine. This delightful treat embodies the vibrant and tangy essence of key limes, balanced perfectly with the sweetness of white chocolate. Whether you’re looking for a unique dessert for a gathering or a simple sweet treat for yourself, this Key Lime Fudge recipe will surely delight your taste buds. With just a handful of ingredients, creating this fudge is easier than you might think. Let’s dive into what makes this recipe special and how you can whip up a batch in no time!
What Makes This Recipe Special
This Key Lime Fudge stands out not only for its refreshing flavor but also for its creamy texture. The combination of white chocolate and marshmallows creates a luscious base that melts in your mouth, while the key lime juice and zest provide a zesty kick that is simply irresistible. Perfect for summer parties, holiday celebrations, or just a sweet afternoon treat, this fudge is a delightful twist on traditional fudge recipes. Plus, it’s incredibly easy to make, requiring minimal effort for maximum flavor!
Ingredient Checklist
To make this delicious Key Lime Fudge, you’ll need the following ingredients:
- 1 (5-ounce) can 2% evaporated milk – This adds creaminess and richness to the fudge.
- 1 cup granulated white sugar – Sweetness is key in balancing the tartness of the lime.
- 1/4 teaspoon salt – Enhances all the flavors.
- 12 large marshmallows, quartered – Contributes to the fudge’s soft and chewy texture.
- 2 cups white chocolate chips – The main ingredient for that sweet, creamy base.
- 1/2 cup grated lime zest – About 5 limes, for that fresh key lime flavor.
- 2 tablespoons key lime juice – Freshly squeezed from about 5 to 7 limes, adds tanginess.
Tools & Equipment Needed
Before you start making your Key Lime Fudge, gather the following tools:
- Medium saucepan – For melting and combining the ingredients.
- Wooden spoon or spatula – To stir the mixture smoothly.
- 9×9-inch baking pan – Where the fudge will set.
- Parchment paper – For easy removal of the fudge from the pan.
- Measuring cups and spoons – To ensure accurate ingredient amounts.
- Grater – For zesting the limes.
- Juicer – To extract juice from the limes easily.
Build Key Lime Fudge Step by Step

Making Key Lime Fudge is a simple process that involves just a few key steps. Follow this detailed guide to create your luscious fudge!
Step 1: Prepare Your Pan
Line a 9×9-inch baking pan with parchment paper, leaving some overhang on the sides for easy removal later. This step is crucial for ensuring your fudge comes out seamlessly.
Step 2: Combine Ingredients
In a medium saucepan, combine the evaporated milk, granulated sugar, and salt. Stir over medium heat until the sugar has dissolved completely.
Step 3: Add Marshmallows
Once the sugar is dissolved, add the quartered marshmallows to the mixture. Continue stirring until the marshmallows are fully melted and combined into the mixture.
Step 4: Incorporate White Chocolate
Next, remove the saucepan from heat and add the white chocolate chips. Stir until the chocolate has melted and the mixture is smooth and creamy.
Step 5: Add Lime Zest and Juice
Stir in the grated lime zest and key lime juice until well incorporated. This is where the fudge gets its signature flavor!
Step 6: Pour into the Pan
Pour the fudge mixture into the prepared baking pan, smoothing the top with a spatula. Make sure it’s evenly spread out for a uniform thickness.
Step 7: Chill Until Set
Place the baking pan in the refrigerator and let the fudge chill for at least 2 hours, or until firm. This step is essential for achieving the perfect texture.
Step 8: Cut and Serve
Once set, lift the fudge out of the pan using the parchment paper overhang. Cut it into squares and serve. Enjoy the burst of key lime flavor with each delightful bite!
Allergy-Friendly Substitutes

If you have allergies or dietary restrictions, here are some substitutes you can consider:
- Dairy-Free Option: Use coconut milk or almond milk instead of evaporated milk and dairy-free white chocolate chips.
- Vegan Option: Substitute marshmallows with vegan marshmallows and ensure the chocolate chips are dairy-free.
- Gluten-Free: This recipe is naturally gluten-free, but always check labels on the ingredients.
- Low-Sugar Option: Use a sugar substitute that measures like sugar for a lower-calorie version.
Testing Timeline
If you want to test your fudge for the perfect consistency, consider the following timeline:
- 15 Minutes: Stirring and combining ingredients.
- 10 Minutes: Melting marshmallows and chocolate over heat.
- 2 Hours: Chilling in the refrigerator until set.
- 5 Minutes: Cutting and plating the fudge for serving.
Meal Prep & Storage Notes
For optimal freshness, here are some tips on meal prep and storage:
- Storage Duration: Store the fudge in an airtight container in the refrigerator for up to two weeks.
- Freezing: You can freeze the fudge for up to 3 months. Just make sure to wrap it tightly in plastic wrap and then in foil.
- Serving: Allow the frozen fudge to thaw in the refrigerator before serving for the best texture.
Key Lime Fudge FAQs
Can I use regular limes instead of key limes?
Yes, you can use regular limes, but the flavor will be slightly different. Key limes have a unique tartness that gives the fudge its signature taste.
How do I know when the fudge is set?
The fudge will be set when it’s firm to the touch and holds its shape when cut. It should not feel sticky or gooey.
Can I add toppings to my Key Lime Fudge?
Absolutely! Consider adding a sprinkle of lime zest, crushed graham crackers, or even a drizzle of chocolate on top for added flavor and texture.
Is it possible to make this fudge without white chocolate?
While white chocolate is a key ingredient for the creamy texture, you can experiment with other types of chocolate, but it will alter the flavor and texture of the fudge.
Keep Cooking
If you enjoyed this Key Lime Fudge, you might also love these recipes:
- Chocolate Peanut Butter Fudge
- Vegan Chocolate Fudge
- Almond Butter Fudge
- Peppermint Bark for the Holidays
Let’s Eat
There you have it! Your delicious batch of Key Lime Fudge is ready to enjoy. With its creamy texture and zesty flavor, this fudge is bound to be a hit whether you’re sharing it at a gathering or savoring it solo. So grab a piece, close your eyes, and let the taste of summer wash over you with every bite. Happy indulging!

Key Lime Fudge
Ingredients
- 1 (5-ounce) can 2% evaporated milk
- 1 cup granulated white sugar
- 1/4 teaspoon salt
- 12 large marshmallows quartered
- 2 cups white chocolate chips
- 1/2 cup grated lime zest
- 2 tablespoons key lime juice
Instructions
- Line a 9x9-inch baking pan with parchment paper, leaving some overhang on the sides for easy removal later.
- In a medium saucepan, combine the evaporated milk, granulated sugar, and salt. Stir over medium heat until the sugar has dissolved completely.
- Add the quartered marshmallows to the mixture. Continue stirring until the marshmallows are fully melted and combined.
- Remove the saucepan from heat and add the white chocolate chips. Stir until the chocolate has melted and the mixture is smooth and creamy.
- Stir in the grated lime zest and key lime juice until well incorporated.
- Pour the fudge mixture into the prepared baking pan, smoothing the top with a spatula.
- Place the baking pan in the refrigerator and let the fudge chill for at least 2 hours, or until firm.
- Lift the fudge out of the pan using the parchment paper overhang. Cut into squares and serve.
Equipment
- Medium Saucepan
- Wooden spoon or spatula
- 9x9 inch baking pan
- Parchment Paper
- Measuring Cups and Spoons
- Grater
- Juicer
Notes
- Store fudge in an airtight container in the refrigerator for up to two weeks for optimal freshness.
- Freeze fudge for up to 3 months by wrapping tightly in plastic wrap and foil.
- Allow frozen fudge to thaw in the refrigerator before serving for best texture.
- Try dairy-free or vegan substitutes for allergies or dietary restrictions.
- Add toppings like lime zest, crushed graham crackers, or chocolate drizzle for extra flavor.

