Key Lime Fudge

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Key Lime Fudge is creamy, sweet, and tart, bringing a bit of the tropics to a tasty treat. The addition of crystallized ginger takes the flavor to a whole new level.

With just five ingredients, this fudge comes together quickly and once it sets, is ready to enjoy.

Pin Key Lime Fudge to make later.

Key lime fudge with two Key lime halves on a pink platter.

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What ingredients do I need to make Key Lime Fudge?

Just a few ingredients are necessary and this fudge comes together quickly.

  • Key Lime Juice – If you can’t find fresh Key limes, a good bottled Key lime juice is a good substitute.
  • Key Lime Zest – If you don’t have fresh Key limes, you can omit this. The oils from the zest do help flavor the fudge.
  • White Chocolate Chips – use good quality white chocolate that are fresh.
  • Sweetened Condensed Milk – not evaporated milk.
  • Crystallized Ginger Pieces – Selefina Spices has crystallized ginger already chopped.
White chocolate chips and sweetened condensed milk in a saucepan.

How do you make Key lime fudge?

In a medium saucepan over low heat, you combine white chocolate and sweetened condensed milk stirring until the white chocolate is just melted.

Then you stir in the Key lime juice and zest. Spread it into the prepared pan and sprinkle the chopped crystallized ginger over the top. Gently press it into the fudge. Allow it to set before enjoying.

Key lime fudge with crystallized ginger in a square pan.

Tips and Suggestions

It is imperative you line your baking pan with aluminum foil and coat the foil with butter. Let the foil overhang the edge of the pan. Once the key lime fudge is set, lift the foil out of the pan and remove it from the fudge. Place it on a cutting board to cut into 1 x 1-inch squares.

Store this Key lime fudge in air-tight containers for up to a week. If you prefer, you can store it in the refrigerator.

How is a Key lime different than a regular lime?

“Regular” lime is also known as a Persian lime. Key limes are smaller, rounder, have more seeds, and are yellow when ripe. Persian limes are larger, usually oval, and have a lovely dark green color when ripe.

Key limes have a stronger scent and thinner rind than Persian limes. They are tarter and slightly bitter but have a very balanced flavor.

Chopped crystallized ginger on a cutting board next to a jar of crystallized ginger.

Can I stir the crystallized ginger into the fudge?

Because of the sugary coating on the ginger, I think it would melt into the warm fudge mixture. It’s better to sprinkle it over the top and gently press it into the fudge.

I used crystallized ginger in these delicious ginger molasses cookies too.

What does Key lime fudge taste like?

Because this Key lime fudge is made with white chocolate, it’s very creamy. It melts in your mouth. The Key lime flavor is subtle and comes on the finish.

The crystallized ginger adds a delightfully tangy, yet slightly sweet and peppery subtly to the fudge.

More Tasty Fudge Recipes

If you love fudge, here are some other delicious variations to try.

Did you make this recipe? If so, please leave a comment and 5-star review on the recipe card below. If you really love this recipe, please share it on your social media!

Key Lime Fudge

Taste the tropics with this key lime fudge with a hint of ginger.
5 from 16 votes
Prep Time15 minutes
Chilling Time2 hours
Total Time2 hours 15 minutes
Course: Dessert
Cuisine: American
Servings: 3 dozen pieces


  • 3 cups good white chocolate
  • 1 can (14 ounces) sweetened condesed milk
  • 2 teaspoons Key lime zest
  • 2 tablespoons Key lime juice, fresh if you have it
  • 1 tablespoon crystallized ginger, chopped


  • Line a 9×9-inch square baking pan with aluminum foil. Butter the foil and set aside.
  • In a medium saucepan over low heat combine the white chocolate and sweetened condensed milk. Stir until the white chocolate is just melted.
  • Remove from heat and stir in lime zest and lime juice.
  • Evenly spread the mixture into the prepared 9×9-inch pan. Sprinkle the chopped crystallized ginger on top and gently press into the fudge. Chill for 2 hours or until firm.
  • Using the edges of the foil, gently lift the fudge from the pan and place on a cutting board. Use a knife to cut the fudge into bite-sized pieces.

NUTRITION INFORMATION DISCLAIMER: To obtain the most accurate representation of the nutritional information in any recipe on Family Around the Table, you should calculate the nutritional information with the actual ingredients you used in the recipe. You are solely responsible for ensuring that any nutritional information obtained is accurate. This information is provided as a courtesy. This information comes from online calculators. Although we attempt to provide accurate nutritional information, these figures are only estimates and may not be exact.

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