Best Keto Key Lime Pound Cake

My recipe for keto key lime pound cake is a key lime lover’s dream. Moist, dense, sweet, and topped with a key lime icing, it’s a keto version of its high-carb counterpart!

The recipe that uses key lime juice, key lime extract, and key lime zest for maximum flavor.

I love sharing recipes that will help your keto journey. This cake is perfect for a special occasion, like St. Patrick’s Day, or anytime you have a bag of key limes and are looking for a keto dessert option.

Although it’s a grain-free, sugar-free, gluten-free, and keto-friendly pound cake, its bright key lime flavor will make you think you’re cheating on keto.

But thankfully, this easy keto cake is absolutely keto-friendly!

This key lime pound cake is made with almond flour, but I also have a keto coconut flour pound cake where you can add all the key lime flavors in order to make it nut-free if this is what you need.

It’s a great option for those who cannot consume nuts.

Inspired by our very popular keto pound cake recipe.  This key lime version is sure to be well-loved, too.

Make sure you also check out our complete list of Keto Pound Cakes and Keto Cakes, which any cake lover doing keto would enjoy exploring.

Keto Key Lime Pound Cake

Whether you are looking for a great key lime dessert that is keto-friendly or a snack to enjoy with your favorite cup of hot beverage, this is the cake for you.

It’s one you will be proud to share. Trust me when I tell you that it’s a low-carb cake everyone will embrace, making it perfect for family gatherings or to take to your next church potluck.

I promise you won’t be disappointed!

Can You Substitute Key Lime Juice For Lime Juice?

If you cannot easily access key limes, you can substitute them in equal amounts with Persian limes that are more commonly found in grocery stores. 

However, I do not recommend substituting lemon juice for key limes because the flavor is quite different, and the end result will not be the same. 

You can also use bottled key lime juice as a good alternative to fresh key limes. 

Ingredients Needed

Disclosure: Some of the links below are affiliate links, meaning, at no additional cost to you, I will earn a commission if you click through and make a purchase. 

The following are all the basic ingredients you’ll need to make an almond flour key lime cake that tastes like a traditional pound cake.

Note that the full recipe card is at the bottom of the page.

• Finely milled almond flour: I suggest you measure and then sift the almond flour for the best results, yes, even if it is finely milled.
• Granulated sugar-substitute 
• Unsalted butter, room temperature
• Full-fat cream cheese, room temperature
• Eggs, room temperature
• Key lime juice, fresh or bottled key lime juice
• Key lime extract
• Freshly grated key lime zest
• Vanilla extract

Keto Key Lime Frosting

• Confectioner’s sugar substitute
• Full-fat cream cheese softened
• Unsalted butter, softened
• Cold heavy cream
• Key lime extract
• Freshly grated key lime zest for garnish (optional)
• Key limes sliced for garnish (optional)

Tools Needed

• Mixing bowls
• Electric mixer or stand-up mixer
• 10 X 5-inch Loaf Pan
• Parchment Paper

How To Make This Cake

To begin, preheat your oven to 350 degrees F. and prepare a 10×5 inch loaf pan by greasing it and lining it with parchment paper.

In a small bowl, measure and sift the almond flour, then set it aside.

In a larger bowl, use an electric mixer to combine softened cream cheese and butter with key lime extract and vanilla extract, beating on high until the mixture is light and fluffy.

Gradually add the sugar substitute and mix until well combined. Next, incorporate the eggs one at a time, ensuring each one is fully integrated before adding the next. 

Once the eggs are mixed in, stir in the sifted almond flour, salt, baking powder, and key lime zest, mixing thoroughly.

Finally, add the key lime juice and beat the batter until everything is well combined. Pour the cake batter into the prepared loaf pan and bake for 40 to 45 minutes, or until a toothpick inserted into the center comes out clean.

After baking, allow the cake to cool on a wire rack for at least 15 minutes before removing it from the pan, then let it cool completely.

Once cooled, spread the key lime frosting over the pound cake and garnish with key lime zest.

For the keto key lime frosting, start by beating softened cream cheese, butter, extract, and confectioners sugar substitute in a large bowl using an electric mixer until well combined.

Then, add cold heavy cream and continue to beat until fully incorporated, scraping the bowl several times to ensure a smooth texture.

If the frosting is too thick, you can add a couple of tablespoons of heavy cream to reach your desired consistency.

Use an offset spatula to spread the frosting over the cooled cake, and finish by garnishing with key lime zest and slices.

Store any leftovers in the refrigerator for up to five days or in the freezer for up to three weeks.

If you plan to store the cake for more than a day, it’s best to remove the lime slices to prevent the peel from making the frosting slightly bitter.

Best Sugar Substitute Options For This Recipe

When it comes to choosing your sweetener for this key lime-infused keto pound cake, I have several low-carb options that work well.

I really like Lakanto Monk Fruit Sweetener because the texture is spot on and because there is barely any aftertaste.

This is a great one, especially if you are new to sugar substitutes, because it mimics sugar the most in my book.

I’m also partial to Swerve, an erythritol blend, although you should keep in mind that it does have a bit more of a cooling aftertaste that some people dislike. 

Alternatively, you could also use a stevia- and erythritol-based brand like Pyure.  This is if you prefer to use stevia in your baked goods.

But note that if you go this route, you will need to reduce the amount of sweetener by half since it is twice as sweet as the others.

Lastly, if you can’t easily find a more natural sugar substitute, you can also use Splenda with great success. I know not everyone would agree with me here, and I respect that, but in my book, it’s still better than regular sugar.

As far as the keto key lime frosting goes, you will have to use a confectioner’s sugar substitute. Both Lakanto and Swerve have great ones.

Other Keto Key Lime Recipes

You might also want to try our other key lime recipes:

• Keto key lime cheesecake bars
• Keto no-bake key lime cheesecake
• Keto cheesecake fat bombs

Tag Us

I sure hope you will give this sugar-free key lime pound cake recipe a try. Once you do, make sure you remember to tag us on  Instagram and Facebook.

It’s what keeps this girl encouraged to keep sharing and perfecting her recipes.

If you want a lemon version of this cake, try our keto lemon pound cake for another tasty option.

Also, check out our Amazon Store for our recommendations. You might be surprised by how many great keto options are at your disposal.

Grab Our Books!

In case you don’t know, we have authored two books for you, Essential Keto Bread and Essential Keto Desserts, both inspired by your requests over the years.

It’s my prayer that these keto cookbooks will help make keto a delicious breeze for you.

Join Our Jesus And Keto Movement 

Do you know that it wasn’t until Randy and I began to combine the promises of God’s word about healing and changed our diet to a ketogenic one that we finally began to see our health improve?

By cutting out the junk and focusing on real foods, we gave our bodies the nutrition they needed. Then our bodies did what God designed them to do—to heal themselves.

This is what we believe it means to live in divine health.

This act of obedience is what birthed Fittoserve Group. Today, we are seeing thousands of lives impacted, and the ripple effect of our decision to combine our Christian faith with the keto diet is making a difference in ways we may never know this side of eternity.

Consider joining our Private Facebook Group where others are combining their Christian faith with that of a ketogenic lifestyle.

I love how supportive and encouraging this group of believers is. It’s exciting to see how people are transforming their lives by combining this lifestyle with the Christian faith. 

We invite you to join our Private Facebook Group and see if it’s not the key you have been missing.

Note that once you click the link, you will be prompted to answer a few questions to ensure that you understand what this group stands for.

Be sure to request our FREE Jesus and Keto E-Book (First 7 Days). We hope it blesses you.

Fittoservegroup Keto App

Looking for a fast way to access our keto recipes? We’ve got you covered. There’s an app for that. Yup, there’s a Fit To Serve Group App and it’s going to make your keto diet a delicious breeze!

Access hundreds of recipes that are all sugar-free, gluten-free, and keto-friendly.

Enjoy early access to recipes before they go live on the website. Plus, there are bonus recipes that are exclusive to the app. Make your own personal cookbooks that you can use to organize your favorite recipes.

Search recipes by title, ingredients, keywords, and categories, and of course, every recipe shows complete nutritional facts. 

Get the Fit to Serve Group App for easy-to-follow keto recipes made with easy-to-source ingredients. 

The app is loaded with hundreds of yummy recipes for breakfast, lunch, dinner, snacks, and even desserts!

Learn more by visiting our Fit To Serve Group App Page.