Sweet & Tangy Key Lime Bundt Cake

If you ask me, key lime bundt cake is a little slice of sunshine.

This bright citrus dessert puts a fun twist on your usual bundt cake, with a light and tender crumb that carries the perfect balance of sweet and tart. The fresh key lime juice gives it that classic tangy zip that everyone loves.

It’s topped with a simple lime glaze that seeps into all the nooks and crannies of the cake, making every bite extra moist and flavorful. The zesty glaze adds just the right finishing touch without being too heavy.

It’s a refreshing dessert that works year-round, but seems to taste even better on warm summer afternoons.

What Kind of Key Limes Should I Use?

True Key limes are smaller and more aromatic than regular Persian limes you typically find at the grocery store, but don’t stress if you can’t find them fresh. While fresh Key limes will give you the most authentic flavor, they’re seasonal and can be tricky to find year-round. You can substitute regular Persian lime juice or even bottled Key lime juice (look for brands like Nellie & Joe’s) with good results. If you’re using fresh Key limes, you’ll need about 12-15 of them to get 3/4 cup of juice, since they’re quite small. Just make sure to strain the juice before adding it to your batter to catch any seeds or pulp.

Options for Substitutions

Need to make some swaps? Here are some helpful substitutions for this key lime bundt cake:

• Key lime juice: Can’t find key limes? Regular lime juice works just fine! You can also use bottled key lime juice – just make sure it’s 100% juice. The flavor might be slightly different, but still tasty.
• Sour cream: Plain Greek yogurt makes a perfect 1:1 replacement for sour cream. You could also use buttermilk, though you might want to use a bit less (about 1/3 cup) since it’s thinner.
• Canola oil: Any neutral-flavored oil works here – vegetable oil, grapeseed oil, or even melted coconut oil (though this might add a slight coconut flavor).
• Cream cheese: For the icing, mascarpone cheese can replace cream cheese. If you’re in a pinch, you could make a simple glaze with confectioners’ sugar and lime juice instead.
• White cake mix: Yellow cake mix can work too, though your cake will have a slightly more yellow color. The vanilla pudding mix is pretty important for texture, so try not to skip it!
• Green food coloring: This is totally optional – your cake will taste just as good without it. You can skip it if you prefer a natural look.

Watch Out for These Mistakes While Baking

The biggest challenge when making a key lime bundt cake is getting it to release perfectly from the pan – make sure to thoroughly grease and flour every nook and cranny of your bundt pan, paying special attention to the center tube and any detailed patterns. A common mistake is rushing to remove the cake from the pan too quickly; instead, let it cool in the pan for exactly 10 minutes (set a timer!), then carefully invert it onto a cooling rack. When mixing the batter, avoid overmixing once you’ve combined the wet and dry ingredients, as this can lead to a dense, tough cake – stop mixing as soon as the streaks of flour disappear. For the cream cheese icing, patience is key – make sure your cream cheese is truly at room temperature (leave it out for at least 2 hours) to avoid lumpy frosting, and don’t rush to ice the cake before it’s completely cool, or you’ll end up with a melted mess.

What to Serve With Key Lime Bundt Cake?

This tangy-sweet key lime bundt cake pairs perfectly with a scoop of vanilla ice cream or a dollop of fresh whipped cream to balance out the citrus flavors. If you’re serving it for brunch, a hot cup of coffee or tea makes for a lovely combination – the warmth of the beverages plays nicely against the cool, citrusy cake. For an extra special touch, you might want to add some fresh berries on the side – strawberries or raspberries work especially well with the lime flavors. And if you’re feeling fancy, a drizzle of white chocolate sauce over the top adds another layer of sweetness that guests really enjoy.

Storage Instructions

Keep Fresh: This key lime bundt cake stays moist and tasty when kept in an airtight container in the fridge. Since it has cream cheese frosting, it needs to be refrigerated and will last up to 5 days. Just make sure to cover it well to prevent it from absorbing any fridge odors!

Freeze: Want to make this cake ahead? You can freeze the unfrosted bundt cake for up to 3 months – just wrap it tightly in plastic wrap and then in foil. I recommend adding the cream cheese frosting fresh after thawing, as it tastes best that way.

Serve: When you’re ready to enjoy a slice, let it sit at room temperature for about 30 minutes before serving. This helps the cake reach the perfect texture and lets the flavors really shine. If you’re serving from frozen, thaw the wrapped cake overnight in the fridge before frosting.

Preparation Time	15-20 minutes
Cooking Time	35-45 minutes
Total Time	50-65 minutes
Level of Difficulty	Medium

Estimated Nutrition

Estimated nutrition for the whole recipe (without optional ingredients):

• Calories: 3500-3900
• Protein: 30-40 g
• Fat: 170-190 g
• Carbohydrates: 500-550 g

Ingredients

For the cake:

• 4 large eggs (room temperature)
• 1/2 cup sour cream (I use Daisy brand for tang)
• 3 drops green food coloring
• 3/4 cup key lime juice (freshly squeezed for best flavor)
• 1 box white cake mix
• 1 tsp vanilla extract
• 1 pkg instant vanilla pudding mix
• 1/2 cup granulated sugar
• 3/4 cup canola oil

For the icing:

• 4 cups confectioners’ sugar (sifted for a smoother icing)
• 12 oz cream cheese (room temperature, I use Philadelphia)
• 1 tsp vanilla extract
• 1/4 tsp kosher salt
• key lime zest for garnish

Step 1: Prepare the Oven and Bundt Pan

Preheat your oven to 350 degrees Fahrenheit.

While the oven is heating, generously spray your bundt pan with baking spray to ensure the cake doesn’t stick.

Set the prepared pan aside for later use.

Step 2: Prepare the Cake Batter

In a standing mixer, combine the cake mix, pudding mix, eggs, sour cream, sugar, oil, key lime juice, and vanilla extract.

Beat these ingredients together on medium speed until they are thoroughly combined to form a smooth batter.

Mix in a small amount of green gel food coloring until you achieve the desired shade of green.

Step 3: Bake the Cake

Pour the prepared batter into the greased bundt pan.

Place the pan in the preheated oven and bake for 35-45 minutes.

The cake is done when a toothpick inserted into the center comes out clean.

Remove the cake from the oven and allow it to cool completely in the pan on a wire rack.

Step 4: Cool and Frost the Cake

Once the cake has cooled completely, carefully remove it from the pan.

In your standing mixer, combine the frosting ingredients and beat on high speed until smooth and creamy.

Spoon the frosting into a piping bag and pipe it elegantly over the top of the cake.

Step 5: Add Finishing Touches

If desired, sprinkle key lime zest over the frosting for an extra burst of flavor and a decorative touch.

Serve the cake and enjoy the citrusy delight of this beautifully frosted bundt cake!