Homemade Key Lime Bundt Pound Cake

The tangy, sweet scent of fresh key lime zest mixing with warm vanilla and rich creamed butter instantly brightens up the entire kitchen. This Key Lime Pound Cake is my absolute go-to when I want to bring a slice of pure sunshine to our family table. It hits that perfect sweet spot between a dense, velvety traditional southern pound cake and the bright, zesty punch of a classic key lime pie.

Every slice reveals an incredibly moist, fine-grained interior with a beautiful lime hue, topped off by a thick, sweet glaze that drapes perfectly down the ridges of the bundt cake. My family requests this constantly, loving how the sweet glaze drapes down the sides. It looks elegant on a cake stand, but it’s simple enough to pull together on a quiet afternoon when everyone is craving a refreshing, comforting treat.

Why You’ll Love It

• Show-stopping presentation: The elegant ridges of a classic bundt pan with a cascading white glaze make a gorgeous centerpiece.
• Balanced flavor profile: The sharp, bright acidity of key limes perfectly cuts through the rich sweetness of the sugar.
• Incredible moist crumb: Creaming the butter and cream cheese deeply creates an ultra-plush crumb that stays soft for days.
• Vibrant color boost: A simple baking shortcut guarantees a beautiful lime-green interior that surprises everyone when sliced.
• Effortless serving style: This sturdy pound cake slices cleanly into perfect wedges without crumbling, making it ideal for potlucks.

Ingredient Notes & Details

• Key lime juice and zest: Provides the authentic, aromatic tartness and distinct, floral acidity over regular limes.
• Unsalted butter: The foundational fat that gives this pound cake its signature rich flavor and dense structure.
• Cream cheese: Adds incredible richness and a subtle tang that keeps the dense crumb velvet-soft.
• Lime gelatin mix: Infuses a boost of concentrated lime flavor and gives the cake its gorgeous green interior.
• Eggs: Provide structure and lift, helping this heavy batter rise naturally and hold its shape perfectly.

Natural Substitutions: If key limes are unavailable, bottled key lime juice works beautifully paired with regular lime zest. Swap cream cheese for full-fat sour cream to add a lighter tang to the batter. For a gluten-free option, use a high-quality 1:1 gluten-free baking flour blend.

Step-by-Step Instructions

We begin by creaming the softened butter, cream cheese, and sugar together until the mixture is light and fluffy. This step incorporates essential air pockets into the fats, helping the heavy batter rise evenly in the oven. Next, beat in the lime gelatin powder, which infuses that vibrant color and flavor, followed by the eggs, added one at a time to keep the batter smooth. Blend in the fresh key lime juice, zest, and vanilla extract.

Gradually fold your whisked dry ingredients—flour, baking powder, and salt—into the wet mixture using a rubber spatula. Mix just until the flour patches disappear, as over-mixing will overwork the gluten and yield a tough cake. Pour the thick batter into a thoroughly greased and floured bundt pan. Bake until a toothpick inserted into the center comes out clean, then let it cool completely before adding the glaze.

Expert Tips

• Grease thoroughly: Use a baking spray containing flour to coat every ridge of your bundt pan to prevent sticking.
• Zest before juicing: Collect the green zest first; it’s nearly impossible to zest a cut lime.
• Room temperature ingredients: Ensure eggs, butter, and cream cheese are at room temperature for a smooth batter.
• Tap the pan: Firmly tap the filled pan on the counter to release trapped air pockets before baking.
• Cool before glazing: If the cake is warm, the icing will melt and run right off the sides.

Storage & Reheating

Store leftovers in an airtight container at room temperature for up to 3 days, or in the refrigerator for up to 6 days to maintain peak freshness. Because of the cream cheese, a chilled slice tastes incredibly refreshing on a hot afternoon. You can also freeze the unglazed cake for up to 2 months.

Serving & FAQs

This bright cake pairs beautifully with hot black coffee or cold sweet iced tea. Serve each wedge with a dollop of homemade whipped cream.

Can I make this without the gelatin mix? Yes, omit the gelatin and add an extra tablespoon of lime juice. The color will be pale cream instead of bright green.

How do I remove it without tearing? Let the cake cool in the pan for exactly ten minutes before inverting it onto a wire cooling rack.

Homemade Key Lime Bundt Pound Cake

Prep time: 24 minutes Cook time: 57 minutes Total time: 81 minutes Servings: 12 slices

Ingredients

• 1 cup unsalted butter, softened
• 4 oz cream cheese, softened
• 2 cups granulated sugar
• 1 box (3 oz) lime gelatin mix
• 4 eggs, room temperature
• 1 tsp vanilla extract
• 3 tbsp key lime juice
• 1 tbsp key lime zest
• 3 cups all-purpose flour
• 1 tsp baking powder
• ½ tsp salt
• 1 ½ cups powdered sugar
• 2 ½ tbsp extra key lime juice

Instructions

1. Preheat oven to 325°F (163°C). Grease and flour a 10-inch bundt pan.
2. Beat butter, cream cheese, and sugar until fluffy. Add gelatin, then eggs one at a time. Stir in vanilla, juice, and zest.
3. Fold in flour, baking powder, and salt until combined.
4. Pour into pan; bake 55–60 minutes until a toothpick comes out clean.
5. Cool 10 minutes, invert onto a rack.
6. Whisk powdered sugar and extra juice; drizzle over cooled cake.