Why You’ll Love This Recipe

This recipe is simple enough for beginners and quick enough for last-minute dessert needs. The bright citrus notes from the lime zest and juice give a refreshing twist to classic white cupcakes. The cream cheese frosting is silky and not overly sweet, balancing the tangy cake beautifully. Plus, it yields 24 servings—ideal for parties or large gatherings.

Ingredients

(Tip: You’ll find the full list of ingredients and measurements in the recipe card below.)

Cake:

1 (15.25 ounce) package white cake mix
1 cup water
3 eggs
⅓ cup vegetable oil
2 tablespoons lime zest
1 tablespoon fresh lime juice
3 drops green food coloring (optional)

Frosting:

½ cup butter, softened
1 (8 ounce) package cream cheese, softened
2 tablespoons lime zest
½ teaspoon vanilla extract
1 ½ cups confectioners’ sugar, sifted
2 tablespoons pearlized sprinkles (optional)

Directions

Preheat oven to 350°F (175°C). Line 24 muffin cups with paper liners or spray with cooking spray.
In a bowl, mix cake mix, water, eggs, and vegetable oil using an electric mixer until smooth, about 2 minutes.
Add 2 tablespoons lime zest, lime juice, and food coloring (if using); mix well.
Pour batter evenly into the prepared muffin cups.
Bake for about 18 minutes or until a toothpick inserted into the center comes out clean. Cool cupcakes on a wire rack.
To make frosting, beat butter and cream cheese together until smooth and creamy.
Add 2 tablespoons lime zest and vanilla extract; mix well.
Gradually mix in confectioners’ sugar, ½ cup at a time, until frosting is smooth. Chill in refrigerator for about 30 minutes until thickened.
Spread frosting onto cooled cupcakes and top with sprinkles if desired.

Servings and timing

Servings: 24 cupcakes
Prep time: 20 minutes
Cook time: 20 minutes
Additional time (cooling and chilling frosting): 1 hour
Total time: 1 hour 40 minutes

Variations

Substitute lime zest with lemon zest for a lemon cupcake version.
Add a teaspoon of lime extract for an extra burst of lime flavor.
Use whipped cream cheese frosting for a lighter topping.
Incorporate finely chopped key limes or lime marmalade in the frosting for texture.
Replace vegetable oil with melted coconut oil for a subtle tropical flavor.

Storage/Reheating

Store cupcakes in an airtight container in the refrigerator for up to 3 days. Bring to room temperature before serving for the best flavor and texture. Do not freeze frosted cupcakes, but you can freeze unfrosted cupcakes in a sealed container for up to 2 months. Thaw at room temperature before frosting.

FAQs

Can I make this recipe without food coloring?

Yes, the food coloring is optional and only adds a decorative touch.

Can I use a homemade white cake mix instead of store-bought?

Absolutely, just ensure the homemade cake batter has a similar consistency.

How do I zest a lime properly?

Use a microplane or fine grater to remove just the green outer layer of the lime, avoiding the bitter white pith.

Can I use bottled lime juice instead of fresh lime juice?

Fresh lime juice is preferred for the best flavor, but bottled can be used in a pinch.

Is this frosting suitable for piping?

Yes, once chilled and thickened, the frosting holds well for piping decorations.

Can I make cupcakes in different sizes?

Yes, adjust baking times accordingly: mini cupcakes will need less time, jumbo cupcakes more.

Can I prepare the batter ahead of time?

It’s best to bake the batter fresh for best rising and texture.

How do I prevent cupcakes from drying out?

Don’t overbake and store them in an airtight container to retain moisture.

Are these cupcakes gluten-free?

No, the recipe uses regular white cake mix which contains gluten. Substitute with a gluten-free mix if needed.

Can I add frosting flavors other than lime?

Yes, vanilla or cream cheese frosting without lime zest is a great alternative.

Conclusion

Key Lime Cupcakes deliver a perfect balance of tartness and sweetness with a moist crumb and creamy frosting. Their bright, fresh flavor and easy preparation make them a great choice for celebrations or simple indulgences. Whether you’re an experienced baker or a beginner, these cupcakes will impress with their delightful taste and appealing presentation.