Oh, friends, let me tell you about Key Lime Cake! It’s like sunshine in every single bite. Seriously, if you’re looking for a dessert that’s both tangy and sweet, this is it. I’ve been baking this Key Lime Cake for years, tweaking it until it reached pure perfection (if I do say so myself!). What I really love is how easy it is. You don’t need to be a fancy pastry chef to whip this up – trust me! This recipe is super straightforward, and the results are always amazing. My family begs me to make it for every get-together. Even folks who normally skip dessert go back for seconds. So, get ready to experience a little slice of heaven. You won’t regret trying this Key Lime Cake!

Why You’ll Love This Key Lime Cake
Okay, so why should you make this Key Lime Cake recipe? Let me tell you, it’s a winner! It’s got a few things going for it that’ll make it your new go-to dessert:
Quick and Easy Key Lime Cake
Seriously, this isn’t one of those recipes that takes all day. You can whip it up in no time. Perfect for when you need a dessert fast!
Bursting with Key Lime Flavor
That tangy, refreshing lime flavor is just…wow! It’s not too sweet, not too tart – just perfectly balanced. My favorite part is how it wakes up your taste buds!
Perfect for Any Occasion
Whether it’s a potluck, a birthday, or just a regular Tuesday, this Key Lime Cake fits the bill. It’s always a crowd-pleaser, I promise!
Key Lime Cake: Gathering Your Ingredients
Alright, before we get started, let’s round up everything we need. Don’t worry, it’s a pretty short list! Having everything ready makes baking so much easier, trust me on this one.
Cake Base Ingredients
For the cake itself, you’ll need one 14.5 oz box of yellow cake mix (any brand works!), a 3.4 oz box of instant lime gelatin (this is key!), a cup of water, half a cup of vegetable oil, and four large eggs.
Key Lime Cake Glaze Ingredients
And for that yummy glaze? Just grab two cups of powdered sugar, a quarter cup of Key lime juice, and two tablespoons of milk. Easy peasy!

How to Make Key Lime Cake: Step-by-Step Instructions
Okay, let’s get baking! Don’t worry, this Key Lime Cake recipe is super simple. Just follow these steps, and you’ll have a delicious cake in no time. Promise!
Preparing the Key Lime Cake Batter
First, grab a large bowl (the biggest one you’ve got!). Dump in the cake mix, lime gelatin, water, oil, eggs, and Key lime juice. Now, beat it all together until it’s well combined. You don’t want any lumps, so give it a good mix!
Baking Your Key Lime Cake to Perfection
Now, preheat your oven to 350°F (that’s 175°C for you international bakers!). While it’s heating up, grease and flour a 9×13 inch baking pan. This keeps the cake from sticking! Pour the batter into the pan and pop it in the oven for 30-35 minutes. A wooden skewer inserted into the center should come out clean when it’s done. Let it cool completely in the pan – this is important!
Creating the Key Lime Cake Glaze
While the cake is cooling, let’s make the glaze! In a medium bowl, whisk together the powdered sugar, Key lime juice, and milk until it’s smooth. If it’s too thick, add a tiny bit more milk. Too thin? A little more powdered sugar! You want it pourable.
Glazing and Serving Your Key Lime Cake
Once the cake is completely cool (seriously, don’t skip this!), pour the glaze over the top. Let it set for a bit before slicing and serving. This gives it that nice, pretty look. And that’s it! Enjoy your amazing Key Lime Cake!
Tips for the Best Key Lime Cake
Want to take your Key Lime Cake from “good” to “OMG amazing?” Here are a few little tricks I’ve learned over the years. Trust me, these make all the difference!
Enhancing the Key Lime Flavor
Okay, this is a big one! If you really want that lime flavor to pop, add a little lime zest to the batter. Also, if you can get your hands on fresh Key lime juice, use it! It’s worth the extra effort, I promise.
Achieving the Perfect Key Lime Cake Texture
Nobody wants a dry cake, right? So, don’t overbake it! Keep an eye on it, and take it out as soon as that skewer comes out clean. A slightly underbaked cake is better than a dry one, in my book!
Ensuring a Smooth Key Lime Cake Glaze
Lumpy glaze? No thanks! Sift your powdered sugar before you whisk it into the glaze. This gets rid of any lumps and makes your glaze super smooth and pretty. You’ll thank me later!
Key Lime Cake Variations to Try
Okay, so you’ve mastered the basic Key Lime Cake? Awesome! Now, let’s get a little crazy and try some fun variations. These are all super easy, I promise!
Coconut Key Lime Cake
Want to add a little tropical twist? Just toss in some shredded coconut! You can mix it right into the batter or sprinkle it on top of the glaze. Or both! I’m not judging!
Key Lime Cake with Cream Cheese Frosting
Not a glaze fan? No problem! Cream cheese frosting is amazing with Key lime. Just whip up your favorite recipe. I don’t have one here, but there are a million online. Trust me, it’s delish! You can find a great frosting recipe that could be adapted.
Mini Key Lime Cakes
How cute are mini cakes? Bake the batter in muffin tins for individual servings. Perfect for parties! Just adjust the baking time, and keep an eye on them. They’ll bake faster!
Serving Suggestions for Your Key Lime Cake
Okay, so you’ve got this amazing Key Lime Cake…now what? Well, here are a few ideas to take it to the next level. These are my go-to pairings!
Pair with Fresh Berries
Seriously, this is a classic for a reason! Strawberries, raspberries, blueberries…they all taste amazing with the tangy lime flavor. It’s like a party in your mouth!
Add a Dollop of Whipped Cream
A little light and airy whipped cream? Yes, please! It adds a touch of sweetness and makes the cake even more decadent. Don’t overdo it, though – you still want to taste that lime!
Serve with Key Lime Pie Martini
Okay, this is for the grown-ups! A Key Lime Pie Martini? It’s like dessert in a glass! It’s the perfect sophisticated pairing.
Storing Your Delicious Key Lime Cake
So, you’ve made this amazing Key Lime Cake, but what if you have leftovers? (I know, hard to believe!). Don’t worry, here’s how to keep it fresh and yummy!
Proper Storage Techniques
Just pop any leftover cake into an airtight container. It’ll stay good at room temperature for up to 3 days. Easy peasy!
Reheating Instructions
Honestly, this cake is best served at room temperature or even slightly chilled. No need to reheat it! Just grab a slice and enjoy!
Key Lime Cake: Frequently Asked Questions
Got questions about making this Key Lime Cake? I bet you do! Here are some of the most common questions I get, along with my tried-and-true answers. Let’s get you baking with confidence!
Can I use regular lime juice instead of Key lime juice for this Key Lime Cake recipe?
Okay, so Key lime juice really makes this cake special. It’s got a unique flavor that’s a little more floral and tangy than regular lime juice. But, if you can’t find Key lime juice (it can be tricky!), you can use regular lime juice. Just know that it’ll taste a bit different. You might want to add a little extra sugar to balance out the acidity. But honestly, if you can find it, stick with the Key lime juice for the best Key Lime Cake experience! For more information on citrus fruits, you can check out this resource.
How do I prevent my Key Lime Cake from sinking in the middle?
Ugh, a sunken cake is the worst, right? Usually, it’s from overmixing the batter. That develops too much gluten, which can make the cake collapse. Also, make sure your oven temperature is accurate! An oven that’s too hot or too cold can also cause sinking. Get an oven thermometer! It’s a lifesaver! And don’t keep opening the oven door while it bakes; that sudden temperature change can mess things up, too.
Can I freeze Key Lime Cake?
Yes, you totally can! If you want to make this Key Lime Cake ahead of time (or just save some for later – if you can resist eating it all!), wrap it really tightly in plastic wrap, then put it in a freezer bag. It’ll keep in the freezer for a couple of months. Just thaw it completely before you glaze it. The glaze doesn’t freeze well, so add that fresh when you’re ready to serve!
Key Lime Cake: Nutritional Information
Okay, a quick note! The nutritional info here is just an estimate. It can vary a lot depending on the brands you use and your exact measurements. So, don’t take it as gospel, okay?

Enjoyed This Key Lime Cake Recipe?
Woohoo! I hope you loved this Key Lime Cake recipe as much as I do! Now, go bake it, share it, and then leave a comment below to let me know how it turned out! You can find more delicious recipes on our recipes page.
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Irresistible Key Lime Cake: A Blissful Recipe
- Prep Time: 15 minutes
- Cook Time: 35 minutes
- Total Time: 50 minutes
- Yield: 12 servings 1x
- Category: Dessert
- Method: Baking
- Cuisine: American
- Diet: Vegetarian
Description
A tangy and sweet Key Lime Cake that is perfect for any occasion.
Ingredients
- 1 box (14.5 oz) yellow cake mix
- 1 package (3.4 oz) instant lime gelatin
- 1 cup water
- 1/2 cup vegetable oil
- 4 large eggs
- 1/2 cup Key lime juice
- For the glaze: 2 cups powdered sugar
- 1/4 cup Key lime juice
- 2 tablespoons milk
Instructions
- Preheat oven to 350°F (175°C). Grease and flour a 9×13 inch baking pan.
- In a large bowl, combine cake mix, lime gelatin, water, oil, eggs, and Key lime juice. Beat until well combined.
- Pour batter into the prepared pan and bake for 30-35 minutes, or until a wooden skewer inserted into the center comes out clean.
- Let the cake cool completely in the pan.
- For the glaze, in a medium bowl, whisk together powdered sugar, Key lime juice, and milk until smooth.
- Pour glaze over the cooled cake. Let the glaze set before serving.
Notes
- For a stronger lime flavor, add lime zest to the cake batter.
- Store leftover cake in an airtight container at room temperature.
Nutrition
- Serving Size: 1 slice
- Calories: 350
- Sugar: 35g
- Sodium: 250mg
- Fat: 15g
- Saturated Fat: 5g
- Unsaturated Fat: 8g
- Trans Fat: 0g
- Carbohydrates: 50g
- Fiber: 1g
- Protein: 3g
- Cholesterol: 50mg