If you love tangy, creamy desserts, this Key Lime Fudge is going to be your new favorite treat! It’s smooth, melt-in-your-mouth creamy, and packed with zesty key lime flavor that gives it the perfect balance of sweet and citrusy.
Think of it as key lime pie in fudge form—no baking, no fuss, just pure tropical deliciousness!
Let’s make some fudge!
What You’ll Need
- 2 cups white chocolate chips
- 1 can (14 oz) sweetened condensed milk
- 2 tbsp unsalted butter (melted)
- ¼ cup key lime juice (fresh is best!)
- 1 tbsp key lime zest (plus more for garnish)
- 1 tsp vanilla extract
- A few drops of green food coloring (optional, for a soft lime color)
- ¼ tsp salt
- Optional topping: Crushed graham crackers, extra lime zest, or a drizzle of white chocolate

Pro Tips
- Use fresh key limes! Bottled juice works, but fresh juice gives the best tangy flavor.
- Melt the chocolate slowly. White chocolate can burn easily, so use low heat and stir constantly.
- Let it set completely. Refrigerate for at least 2 hours before cutting to get perfect slices.
- For extra key lime pie vibes, sprinkle crushed graham crackers on top before chilling.
- Want it extra tangy? Add ½ tsp of lime extract for a bigger citrus punch!
Tools You’ll Need
- Medium saucepan
- Spatula
- 8×8-inch baking dish
- Parchment paper
- Knife for cutting
Substitutions & Variations
- Dairy-free option: Use dairy-free white chocolate and coconut condensed milk.
- Sweeter version: Drizzle melted white chocolate over the top before chilling.
- Crunchy version: Stir in crushed vanilla wafers or chopped macadamia nuts.
- Extra tart: Mix in ½ tsp lemon zest for a citrusy blend.
Instructions
1. Melt the chocolate.
In a saucepan over low heat, melt white chocolate chips, sweetened condensed milk, and butter, stirring constantly until smooth.

2. Add the key lime flavor.
Remove from heat and stir in key lime juice, lime zest, vanilla extract, salt, and food coloring (if using).

3. Pour into the pan.
Line an 8×8-inch baking dish with parchment paper, then spread the fudge evenly.

4. Add toppings.
Sprinkle extra lime zest and crushed graham crackers on top for extra flavor.

5. Chill and set.
Refrigerate for at least 2 hours or until firm.

6. Cut and serve.
Once set, lift the fudge out using the parchment paper, cut into squares, and enjoy!

Leftovers & Storage
- Store in an airtight container in the fridge for up to 1 week.
- Want to keep it longer? Freeze the fudge for up to 3 months and thaw before serving.
Wrap-Up
And that’s it—your Key Lime Fudge is ready to enjoy! It’s sweet, tangy, and packed with key lime pie flavor in every bite. Try it out, take a pic, and let me know how it turned out. Happy snacking! 🍋✨