If you love rich, buttery cakes with a fresh, zesty twist, this Key Lime Pound Cake is your new best friend. I first baked it for a summer BBQ, and it disappeared in no time, there’s just something irresistible about the bright lime flavor cutting through the moist pound cake. My Florida-based aunt shared the secret: always use fresh key lime juice and zest for that perfect zing that keeps every bite juicy.

This recipe is foolproof, so even if you’re not a pro baker, you’ll nail it every time. It’s the perfect balance of indulgence and freshness, great for cozy nights or serving to friends with coffee or tea. Get ready to impress everyone with this sunny cake that tastes like summer on a plate!
Table of Contents
Why You’ll Love This Key Lime Pound Cake
Let me count the ways this Key Lime Pound Cake will become your new favorite dessert! First off, it’s ridiculously easy to make, we’re talking mix, pour, bake, glaze. No fancy techniques required. Here’s what makes it so special:
- That tangy-sweet citrus punch: The fresh key lime juice and zest give every bite a bright, refreshing flavor that’s perfect for warm weather
 - Moist texture guaranteed: Between the melted butter and lime juice, this cake stays deliciously tender for days
 - Quick prep time: You can go from mixing bowl to oven in under 10 minutes
 - Stunning presentation: That vibrant green glaze dripping down the sides? Pure dessert magic
 - Versatile serving options: Equally amazing with afternoon tea, after dinner, or as a picnic treat
 
Seriously, once you try this cake, you’ll understand why I make it at least twice a month during summer!
Ingredients for Key Lime Pound Cake
Alright, let’s talk ingredients – because using the right stuff makes all the difference between a good cake and a “holy moly, I need another slice” cake. Here’s exactly what you’ll need:
For the Pound Cake:
- 1 box (16.5 oz) vanilla pound cake mix – I usually grab Betty Crocker, but any brand works
 - ¾ cup cold water – trust me, cold helps create the perfect texture
 - ½ cup unsalted butter, melted – and please, please use real butter
 - 1 large egg – room temperature is ideal
 - 3 tablespoons fresh key lime juice – squeeze it yourself for that vibrant flavor
 - 2 tablespoons key lime zest – about 4-5 key limes’ worth
 - 3 drops lime gel food coloring (optional) – just for that pretty pastel green hue
 
For the Key Lime Glaze:
- 1½ cups powdered sugar – sifted if you’re feeling fancy
 - 6 tablespoons key lime zest – yes, really! It packs amazing flavor
 - 4 tablespoons key lime juice – fresh squeezed makes all the difference
 
Pro tip: When zesting limes, only take the green part – the white pith underneath is bitter. And don’t skimp on the zest – it’s where all that incredible citrus oil lives!
Equipment Needed for Key Lime Pound Cake
Don’t worry – you don’t need fancy gadgets for this recipe! Just grab these basic kitchen tools:
- 2 small loaf pans (about 8×4 inches) – or one large Bundt pan if you prefer
 - Mixing bowls – one large, one medium
 - Whisk and rubber spatula
 - Measuring cups and spoons
 - Zester or fine grater – for all that lovely lime zest
 - Wire rack – for cooling your masterpiece
 
That’s it! Now let’s get baking – the citrusy goodness awaits!

How to Make Key Lime Pound Cake
Okay, let’s dive into the fun part, making this sunshine-filled cake! I promise it’s easier than you think, and the results will make you feel like a baking superstar.
Follow these steps, and you’ll have the most amazing Key Lime Pound Cake in under an hour.
Prepping and Mixing the Batter
First things first – preheat your oven to 350°F (175°C). While that’s heating up, grab those loaf pans and give them a good spray with non-stick baking spray. I like to do this right away so I don’t forget later (learned that lesson the hard way!).
Now for the batter – in your large mixing bowl, combine the pound cake mix, cold water, melted butter, egg, key lime juice, zest, and food coloring if you’re using it. Here’s my secret: mix by hand with a whisk first to incorporate everything, then switch to a spatula to finish. This prevents overmixing (which can make the cake tough) but still gets everything perfectly smooth. The batter should be thick but pourable – if it seems too stiff, add just a teaspoon more water.
Baking to Perfection
Divide that gorgeous green batter evenly between your prepared pans. Give each pan a gentle tap on the counter to release any sneaky air bubbles – this helps prevent those big holes in your finished cake. Pop them in the oven (I like to put them on a baking sheet just in case of drips) and set your timer for 30 minutes.
At the 30-minute mark, do the toothpick test – stick it in the center, and if it comes out clean or with just a few moist crumbs, you’re golden! If not, give it another 2-5 minutes. Every oven is different, so don’t panic if yours needs a bit longer. The cakes should be golden around the edges and spring back lightly when touched.
The Glaze That Makes It Shine
Let the cakes cool in their pans for about 10 minutes. This helps them set so they don’t fall apart when you flip them. Then carefully transfer them to a wire rack to cool completely. While you wait, make that dreamy glaze: whisk together the powdered sugar, lime juice, and zest until smooth. It should be thick but pourable – if it’s too thick, add more juice a teaspoon at a time.
Place your cooled cakes on the rack with a baking sheet underneath (trust me, this saves cleanup!). Now the fun part – slowly pour that glaze over the top, letting it cascade down the sides in beautiful drips. I like to do this while the cakes are still slightly warm so the glaze soaks in just a bit. Let it set for about 15 minutes before slicing – if you can wait that long!

Tips for Perfect Key Lime Pound Cake
After making this cake more times than I can count, I’ve picked up some foolproof tricks to guarantee success every time.
First, always tap those pans on the counter before baking! It seems silly, but it prevents those giant air pockets that can ruin your cake’s texture.
Second, don’t even think about bottled lime juice. Freshly squeezed key lime juice makes all the difference in flavor.
Pro tip: roll your limes on the counter before juicing to get every last drop!
For the glaze, aim for a honey-like consistency – thick enough to coat the back of a spoon but thin enough to drizzle. If it’s too runny, add more powdered sugar a tablespoon at a time. Too thick? A teaspoon of juice will fix it right up.
And here’s my secret weapon: zest your limes before juicing them. Trying to zest a squeezed lime is like wrestling a wet bar of soap!
Variations for Key Lime Pound Cake
Listen, I love this recipe exactly as written – but sometimes you’ve gotta mix things up! Here are my favorite twists that still keep that amazing citrus flavor:
- Coconut lime dream: Fold in ½ cup toasted coconut flakes to the batter and sprinkle more on top of the glaze
 - Berry burst: Gently swirl in ⅓ cup raspberry or strawberry jam before baking for pretty pink ribbons
 - Regular lime works too: Can’t find key limes? Regular Persian limes will still give you fantastic flavor
 - Adult version: Add 1 tablespoon lime vodka or rum to the glaze for extra zing (just keep it away from kids!)
 - Mini muffins: Bake the batter in muffin tins for adorable individual treats
 
The beauty of this Key Lime Pound Cake? It’s like your favorite little black dress, endlessly adaptable!
Serving and Storing Key Lime Pound Cake
Now comes the best part, eating this gorgeous cake! I love serving it slightly warm with a dollop of fresh whipped cream and a handful of raspberries or blueberries. The berries’ tartness plays so nicely with the lime’s zing. For brunch, try it with a scoop of vanilla ice cream – the creaminess balances the citrus perfectly.
Leftovers? Ha! Just kidding, though they never last long in my house. If you do have some to save, here’s how to keep it fresh:
- Room temperature: Store in an airtight container for up to 3 days – the glaze helps keep it moist
 - Refrigerator: If your kitchen is warm, pop it in the fridge for up to 5 days (let slices come to room temp before serving)
 - Freezing: Wrap unglazed loaf tightly in plastic, then foil, and freeze for up to 3 months. Thaw overnight in the fridge, then add fresh glaze before serving
 
Pro tip: Always slice with a serrated knife using a gentle sawing motion; those perfect, clean slices are worth the extra second!

Nutritional Information for Key Lime Pound Cake
Okay, let’s be real, we’re not eating pound cake for health food! But here’s the scoop:
- Each delicious slice (about 1/10th of the loaf) packs about 280 calories.
 - You’re looking at 12g fat (7g saturated), 40g carbs, and 3g protein.
 - The sugar comes in at 25g – but hey, that’s why it tastes so good!
 
Pro tip: If you’re watching sugar, you can reduce the powdered sugar in the glaze by 1/4 cup. The lime flavor still shines through beautifully!
FAQ About Key Lime Pound Cake
Can I use regular limes instead of key limes?
Absolutely! Regular Persian limes work beautifully in this recipe. You’ll get a slightly different flavor profile – key limes are more floral while regular limes are more tart – but the cake will still be delicious. Use the same amounts called for in the recipe.
How do I know when my pound cake is done baking?
The toothpick test never fails me! Insert it into the center – if it comes out clean or with just a few moist crumbs (not wet batter), it’s done. The edges should be lightly golden and the top should spring back when gently pressed.
Can I make this cake ahead of time?
You sure can! The glaze actually helps keep it moist. Bake it up to 2 days in advance and store at room temperature. Or freeze the unglazed cake for up to 3 months – just add fresh glaze after thawing.
Why did my glaze turn out lumpy?
This usually happens if the powdered sugar wasn’t sifted. No worries – just whisk vigorously or push it through a fine mesh strainer. For perfect smoothness every time, I always sift my powdered sugar first.
Can I bake this in a Bundt pan?
Yes! Use a 10-cup Bundt pan and bake for about 45-50 minutes. Let it cool in the pan for 15 minutes before flipping, that pretty design deserves to shine!
More Delicious Citrus and Pound Cake Recipes to Indulge In
If you love the bright, tangy flavor of Key Lime Pound Cake, be sure to check out these other citrusy and rich dessert recipes that are perfect for any occasion.
- Satisfy your citrus cravings with the refreshing Orange Creamsicle Cookies for a deliciously tangy treat.
 - For a decadent chocolate and lime combo, try the rich Strawberry Tiramisù with its luscious layers.
 - Enjoy the classic comfort of Coconut Cream Pie, a creamy tropical dessert well-loved by many.
 - Looking for a fun baking challenge? Bake the moist and flavorful German Chocolate Whoopie Pies for a delightful surprise.
 
Explore these recipes and add a variety of citrus-inspired sweets to your baking collection. Every bite promises a burst of flavor and joy!
Share Your Key Lime Pound Cake Experience
I’d love to hear how your Key Lime Pound Cake turns out! Did you add any fun twists? Maybe a splash of coconut or a dusting of powdered sugar? Drop a comment below with your experience, and don’t forget to snap a photo before it disappears! Tag me on Instagram, so I can see your citrusy masterpiece. Happy baking!
Print
		Key Lime Pound Cake
- Total Time: 45 minutes
 - Yield: 10 servings 1x
 - Diet: Vegetarian
 
Description
A moist, buttery pound cake bursting with bright citrus flavor, topped with a tangy key lime glaze, this easy-to-make treat is perfect for spring and summer!
Ingredients
- For the Pound Cake:
- 1 box vanilla pound cake mix (16.5 oz)
 - ¾ cup cold water
 - ½ cup unsalted butter, melted
 - 1 large egg
 - 3 tablespoons fresh key lime juice
 - 2 tablespoons key lime zest
 - 3 drops lime gel food coloring (optional, for a vibrant green color)
 
 - For the Key Lime Glaze:
- 1½ cups powdered sugar
 - 6 tablespoons key lime zest
 - 4 tablespoons key lime juice
 
 
Instructions
- Preheat the Oven: Preheat your oven to 350°F (175°C). Coat two small loaf pans with non-stick baking spray.
 - Make the Cake Batter: In a large mixing bowl, combine cake mix, water, melted butter, egg, key lime juice, key lime zest, and gel food coloring (if using). Mix until well combined and smooth.
 - Fill the Pans & Bake: Divide the batter evenly between the two loaf pans. Gently tap the pans on the countertop to release air bubbles. Place the pans on a baking sheet and bake for 30–35 minutes, or until a toothpick inserted into the center comes out clean.
 - Cool the Cakes: Remove from the oven and cool in the pans for 10 minutes. Flip the cakes onto a wire rack to cool completely.
 - Prepare the Glaze: In a medium bowl, whisk together powdered sugar, key lime juice, and key lime zest. Stir until smooth and pourable.
 - Glaze the Cakes: Place the cooled cakes on a wire rack with a baking sheet underneath to catch drips. Slowly pour the glaze over the cakes, letting it drizzle down the sides. Allow the glaze to set completely before slicing and serving.
 
Notes
- Best served fresh, but can be stored in an airtight container for up to 3 days at room temperature.
 - Refrigerate for longer storage, or freeze slices for up to 3 months.
 - Pairs perfectly with fresh berries, whipped cream, or a cup of hot tea!
 
- Prep Time: 10 minutes
 - Cook Time: 30-35 minutes
 - Category: Dessert
 - Method: Baked
 - Cuisine: American
 
Nutrition
- Serving Size: 1 slice
 - Calories: 310
 - Sugar: 27g
 - Sodium: 220mg
 - Fat: 14g
 - Saturated Fat: 8g
 - Unsaturated Fat: 6g
 - Trans Fat: 0g
 - Carbohydrates: 41g
 - Fiber: 0g
 - Protein: 3g
 - Cholesterol: 55mg
 
Keywords: key lime pound cake, citrus dessert, summer cake, easy loaf cake, lime glaze
