Key Lime Cake Recipe From Scratch
If you’re a lover of bright, zesty flavors, then this Key Lime Cake Recipe From Scratch is just the treat you need to indulge in. This cake is a delightful blend of sweet and tart, capturing the essence of the sun-kissed Florida Keys in every bite. With its moist texture and refreshing lime flavor, it’s perfect for any occasion—whether it’s a summer picnic, a birthday celebration, or simply a sweet weeknight dessert.
The beauty of making this cake from scratch lies not only in its taste but also in the process, which can be just as rewarding. With a handful of simple ingredients and a few steps, you’ll transform ordinary elements into a sensational dessert that will impress family and friends. Let’s get baking!
Why This Recipe Is a Must-Try

This Key Lime Cake Recipe From Scratch stands out for several reasons. First, it uses fresh lime juice and zest, which elevate the flavor profile beyond any store-bought cake. Second, the combination of buttermilk and butter creates an incredibly moist crumb that melts in your mouth. Finally, this recipe is versatile and can easily be adapted or adorned with different toppings to suit your taste. Whether you’re a seasoned baker or a novice in the kitchen, this cake is sure to become a staple in your dessert repertoire.
Ingredients
- 1 ¾ cups all-purpose flour
- 1 ½ teaspoons baking powder
- ½ teaspoon baking soda
- ½ teaspoon salt
- 1 cup unsalted butter, softened
- 1 ½ cups granulated sugar
- 3 large eggs
- ½ cup fresh lime juice
- Zest of 2 limes
- 1 cup buttermilk
How To Make Key Lime Cake Recipe From Scratch

Step 1: Prepare Your Ingredients
Start by gathering all your ingredients and preheating your oven to 350°F (175°C). Grease and flour two 9-inch round cake pans to ensure your cake comes out easily after baking.
Step 2: Mix the Dry Ingredients
In a medium bowl, whisk together the all-purpose flour, baking powder, baking soda, and salt. This helps to evenly distribute the leavening agents throughout the flour, ensuring a uniform rise.
Step 3: Cream the Butter and Sugar
In a large mixing bowl, beat the softened unsalted butter and granulated sugar together using an electric mixer on medium speed until the mixture is light and fluffy, about 3-5 minutes. This step is crucial as it incorporates air into the batter, giving your cake a light texture.
Step 4: Add the Eggs
Add the eggs one at a time, mixing well after each addition. This allows the eggs to emulsify into the batter, resulting in a smooth mixture.
Step 5: Incorporate Lime Juice and Zest
Next, pour in the fresh lime juice and add the zest of the limes. Mix until well combined. The acidity of the lime juice balances the sweetness of the cake, creating that signature key lime flavor.
Step 6: Alternate Adding Dry Ingredients and Buttermilk
With the mixer on low speed, alternate adding the dry ingredient mixture and buttermilk to the butter mixture. Start with one-third of the dry ingredients, followed by half of the buttermilk, and repeat until all ingredients are combined. Be careful not to over-mix, as this can lead to a dense cake.
Step 7: Bake the Cakes
Divide the batter evenly between the prepared cake pans. Bake in the preheated oven for 25-30 minutes, or until a toothpick inserted in the center comes out clean. Once baked, allow them to cool in the pans for about 10 minutes before transferring to wire racks to cool completely.
Step 8: Frost and Serve
Once the cakes are completely cooled, frost with your favorite icing. A simple cream cheese frosting or whipped cream pairs beautifully with the bright flavors of the cake. Serve with lime slices or additional zest for a beautiful presentation.
Expert Tips
- For the best flavor, use fresh limes rather than bottled lime juice.
- Make sure your butter is softened, not melted, for the best texture.
- Allow your cakes to cool completely before frosting to prevent the icing from melting.
- For an extra touch, top with a sprinkle of graham cracker crumbs for a key lime pie vibe.
Variations and Customizations
- For a full-on tropical experience, add shredded coconut to the batter.
- Incorporate a layer of key lime curd between the cake layers for an extra burst of flavor.
- Substitute the buttermilk with coconut milk for a dairy-free option.
- Add blueberries or raspberries on top for a pop of color and flavor contrast.
How to Store Leftovers
To store any leftover Key Lime Cake, place it in an airtight container and keep it in the refrigerator for up to 5 days. If you’d like to freeze the cake, wrap individual slices in plastic wrap and then aluminum foil to prevent freezer burn. It can be stored in the freezer for up to 3 months. To enjoy, simply thaw in the refrigerator overnight before serving.
FAQ
Can I make this cake ahead of time?
Absolutely! You can bake the cakes in advance and store them in the refrigerator for a couple of days before frosting and serving.
What can I use instead of buttermilk?
If you don’t have buttermilk on hand, you can make a quick substitute by mixing 1 cup of milk with 1 tablespoon of vinegar or lemon juice. Let it sit for about 5 minutes before using.
Can I use key lime juice instead of regular lime juice?
Yes, using key lime juice will enhance the flavor of your cake even further, giving it that authentic key lime taste.
How can I make this cake gluten-free?
You can substitute the all-purpose flour with a gluten-free flour blend designed for baking. Just make sure it contains xanthan gum for the best results in texture.
Conclusion
This Key Lime Cake Recipe From Scratch is a celebration of flavor that brings the essence of the Florida Keys to your kitchen. With its zesty lime notes and moist texture, it’s bound to be a hit with anyone who takes a bite. Whether you’re enjoying it at a summer gathering or savoring a slice after dinner, this cake is sure to leave a lasting impression. So gather your ingredients, roll up your sleeves, and let’s bake something extraordinary!