This creamy key lime fudge is smooth, rich, sweet, and full of fresh citrus flavor. It tastes just like a slice of key lime pie mixed with soft homemade fudge. The bright lime flavor and creamy white chocolate make this dessert extra special.

This easy dessert is perfect for spring parties, summer holidays, baby showers, potlucks, and weekend treats. Since it is a no bake recipe, it is simple to make and great for beginner bakers too.

The soft green color, buttery texture, and crunchy graham cracker topping make this easy key lime pie fudge recipe both beautiful and delicious. It is one of those desserts that looks fancy but takes very little work.

Table of Contents

Why You Will Love This Key Lime Fudge Recipe

Easy no bake dessert recipe
Creamy and rich texture
Sweet and tangy lime flavor
Perfect for spring and summer desserts
Great make-ahead treat
Simple pantry ingredients
Beginner-friendly recipe
Easy to slice and serve
Stores well in the refrigerator
Tastes like key lime pie fudge
Perfect for parties and dessert trays
Fun and colorful dessert idea

Ingredients for Homemade Key Lime Fudge

3 cups white chocolate chips
1 can sweetened condensed milk (14 oz)
2 tbsp unsalted butter
3 tbsp key lime juice
1 tbsp fresh key lime zest
1 tsp vanilla extract
2 to 3 drops green food coloring (optional)
2 tbsp graham cracker crumbs for topping

Ingredient Notes and Easy Substitutions

White Chocolate Chips

White chocolate chips help create the rich and creamy fudge texture. Use good-quality white chocolate for the smoothest results. White chocolate bars chopped into small pieces also work well.

Sweetened Condensed Milk

Sweetened condensed milk makes the fudge soft, creamy, and sweet. Do not use evaporated milk because it will not set the same way.

Key Lime Juice

Fresh key lime juice gives the best bright citrus flavor. Bottled key lime juice can be used if needed. Regular lime juice also works in this recipe.

Lime Zest

Fresh lime zest adds strong lime flavor and makes the fudge taste fresher. Only grate the green outer layer of the lime because the white part tastes bitter.

Graham Cracker Crumbs

Graham cracker crumbs give the fudge a classic key lime pie dessert flavor. Sprinkle them lightly on top for texture and crunch.

Green Food Coloring

This is optional but gives the fudge a soft green color that looks pretty for parties and holidays.

How to Make Key Lime Fudge

Step 1 – Prepare the Baking Pan

Line an 8×8-inch baking pan with parchment paper. Leave extra parchment hanging over the sides so the fudge can be lifted out easily later.

Press the parchment gently into the corners of the pan. This helps the fudge hold its shape once chilled.

Set the prepared pan aside while you make the fudge mixture.

Step 2 – Melt the White Chocolate Mixture

Place the white chocolate chips, sweetened condensed milk, and butter into a medium saucepan.

Turn the heat to low. Stir slowly and constantly as the ingredients melt together. The mixture will slowly become thick, creamy, and smooth.

Do not rush this step or use high heat because white chocolate burns easily. If the chocolate gets too hot, the texture can become grainy.

Continue stirring until no lumps remain.

Step 3 – Add the Lime Flavor

Remove the saucepan from the heat once the mixture is smooth.

Pour in the key lime juice and vanilla extract. Add the fresh lime zest and green food coloring if using.

Stir everything together until fully combined. The fudge mixture should look smooth, glossy, and lightly green.

The fresh lime zest will make the whole mixture smell bright and citrusy.

Step 4 – Spread the Fudge Into the Pan

Pour the warm fudge mixture into the prepared baking pan.

Use a spatula or spoon to spread the mixture evenly into all corners. Smooth the top gently but do not worry if it is not perfect.

Sprinkle graham cracker crumbs evenly over the top while the fudge is still soft. The crumbs will lightly stick to the surface.

Step 5 – Chill the Fudge

Place the pan into the refrigerator uncovered for about 3 hours.

The fudge needs enough time to fully set and become firm enough for slicing. If the center still feels soft, chill it longer.

For extra clean slices, chill the fudge overnight.

Step 6 – Slice and Serve

Once the fudge is firm, lift it out of the pan using the parchment paper.

Place it onto a cutting board and use a sharp knife to cut into small squares.

Wipe the knife clean between cuts for smoother edges.

Serve the fudge chilled or slightly cool for the best creamy texture.

Tips for the Best Key Lime Pie Fudge

Use low heat when melting white chocolate.
Stir constantly to prevent burning.
Fresh lime zest gives stronger flavor than bottled juice alone.
Chill fully before cutting.
Use parchment paper for easy removal.
Wipe the knife clean after every slice.
Store the fudge in the refrigerator for the best texture.
Use good-quality white chocolate for creamier fudge.
Add extra graham cracker crumbs right before serving for added crunch.

Delicious Variations and Add-Ins

Coconut Key Lime Fudge

Mix toasted coconut flakes into the fudge for a tropical dessert flavor.

White Chocolate Drizzle

Drizzle melted white chocolate over the chilled fudge before slicing.

Lime Cookie Fudge

Mix crushed vanilla sandwich cookies or graham crackers into the fudge mixture.

Extra Citrus Flavor

Add a little lemon zest along with the lime zest for a brighter citrus taste.

Crunchy Nut Topping

Top the fudge with chopped macadamia nuts or pecans.

Marshmallow Swirl

Swirl marshmallow cream into the fudge before chilling for a softer texture.

What to Serve With Key Lime Fudge

Fresh strawberries
Blueberries
Coconut cookies
Vanilla ice cream
Whipped cream
Iced coffee
Sweet tea
Lemon bars
Fruit platters
Lime sparkling water

How to Store Key Lime Fudge

Refrigerator

Store the fudge in an airtight container in the refrigerator for up to 1 week.

Place parchment paper between layers to prevent sticking.

Freezer

Freeze the fudge in a freezer-safe container for up to 2 months.

Let the fudge thaw in the refrigerator before serving.

Common Mistakes to Avoid

Using high heat when melting chocolate
Skipping the parchment paper
Adding too much lime juice
Not chilling the fudge long enough
Using poor-quality white chocolate
Cutting the fudge before fully firm

Creamy Key Lime Fudge

This easy key lime fudge recipe is creamy, rich, sweet, and packed with fresh citrus flavor. Made with white chocolate, sweetened condensed milk, and fresh lime juice, this simple no bake dessert tastes just like key lime pie in fudge form.

Print Recipe Pin Recipe

Prep Time 10

Cook Time 10

Chill Time 3

Servings: 25

Course: Dessert

Cuisine: American

Ingredients Method Notes

Ingredients

3 cups white chocolate chips
1 can sweetened condensed milk 14 oz
2 tbsp unsalted butter
3 tbsp key lime juice
1 tbsp key lime zest
1 tsp vanilla extract
2 to 3 drops green food coloring optional
2 tbsp graham cracker crumbs

Method

Line an 8×8-inch baking pan with parchment paper. Leave extra parchment paper hanging over the sides for easy removal later. Press the parchment gently into the corners of the pan and set aside.
Add the white chocolate chips, sweetened condensed milk, and butter to a medium saucepan. Place the saucepan over low heat.

Stir the mixture slowly and continuously as the chocolate melts. Continue stirring until the mixture becomes smooth, creamy, and fully melted with no lumps remaining.
Remove the saucepan from the heat. Stir in the key lime juice, lime zest, vanilla extract, and green food coloring if using. Mix until fully combined and smooth.
Pour the fudge mixture into the prepared baking pan. Spread evenly using a spatula, making sure the mixture reaches all corners.

Sprinkle graham cracker crumbs evenly across the top of the fudge while the surface is still soft.
Place the pan into the refrigerator and chill for at least 3 hours or until the fudge is fully firm.
Lift the chilled fudge out of the pan using the parchment paper. Transfer to a cutting board and slice into small squares using a sharp knife.

Serve chilled for the best creamy texture. Store leftovers in an airtight container in the refrigerator.

Notes

Fresh lime zest gives the strongest citrus flavor.
Chill overnight for cleaner slices.
White chocolate can burn quickly, so always use low heat.
For extra lime flavor, add additional zest.
Store chilled because the fudge softens at room temperature.
Small squares work best because this dessert is rich.

This creamy homemade key lime fudge is the perfect easy dessert for lime lovers. The smooth white chocolate texture mixed with fresh citrus flavor creates a rich and refreshing treat that tastes just like key lime pie fudge.

It is simple to make, easy to store, and perfect for holidays, parties, dessert trays, and summer gatherings. The sweet and tangy flavor makes this one of the best no bake desserts to share with family and friends.