If you love key limes, you are going to be head over heals for this keto almond flour cake. The bright citrusy lime flavor offsets the sweet, tender cake to perfection.
I seem to have a slight obsession with cake at the moment. And by “slight”, I mean can’t stop thinking about cake, making cake, eating cake and dreaming up delectable keto cake recipes. And by “at the moment”, I really mean for about as long as I’ve been making low carb treats!
Key limes are one of those wonderful ingredients that lend themselves to a wide array of delicious goodies. Of course, I have a classic Keto Key Lime Pie recipe, as well as keto key lime cheesecake. And this pound cake recipe is an oldie but a goodie.
It’s been on my website for almost 8 year so it was definitely time for an update!
You’ll love this updated recipe!
With a few small tweaks, I’ve made this delicious keto pound cake better than ever.
- It’s easy: This lovely low carb key lime cake is relatively simple to make, as cakes go.
- Great flavor: Bright and citrusy, with a lovely key lime glaze drizzled over.
- Perfect texture: This cake has a fine, tender crumb – as long as you use good ingredients and follow my instructions, of course!
- Great for any occasion: This is the sort of cake that you can whip up easily for company and serve as brunch, tea, or dessert.
Reader’s Thoughts
“Loved this recipe, the flavour of the lime through the cake and the glaze was delicious. The size of the cake was also fabulous it has a good depth to it and the texture is amazing.” — Valerie
Ingredient Notes
- Almond flour: Fine blanched almond flour will give you the best texture for all of your keto cakes.
- Protein powder: Gluten is a protein and in its absence, another dry protein powder helps keto cakes rise and hold their shape. I recommend whey or egg white protein for this recipe.
- Sweetener: I recommend an erythritol based sweetener for the cake. You will need a powdered sweeten for the glaze.
- Key limes: You can squeeze fresh limes or purchase the bottled key lime juice.
- Kitchen staples: Butter, eggs, baking powder, and salt.
Step by Step Directions
- Combine the dry ingredients: In a medium bowl, whisk together the almond flour, coconut flour, baking powder, and salt.
- Cream the butter: In a large bowl, beat the butter and sweetener together until lightened and fluffy, about 2 minutes. Beat in the eggs until well combined.
- Add remaining ingredients: Beat in half of the almond flour mixture, then beat in the almond milk, lime juice, and lime zest. Beat in the remaining almond flour mixture.
- Bake: Transfer to a greased 9×5 inch loaf pan and smooth the top. Bake at 325ºF for 55 to 65 minutes. Cover with foil at about the halfway point to make sure the top doesn’t get overly browned. The cake is done with the edges are golden and the top is firm to the touch.
- Glaze the cake: Whisk the powdered sweetener and lime juice together until smooth (should be somewhat runny). Drizzle over the cooled cake.
Tips for Success
Key limes are teeny tiny things and it takes quite a few of them to get enough juice. They are a pain to squeeze! So I recommend the bottled juice from concentrate if you can find it. Many grocery stores carry it, as does Amazon. You will also need some lime zest, so you will need a fresh key lime or other lime variety.
If your loaf pan is not very non-stick, consider lining it with with parchment on the bottom and along the long sides, with some overhanging edges. It will make it easier to remove.
Dairy-Free Option: Replace the butter with avocado oil (or another neutral tasting oil). Use egg white protein powder instead of whey protein.
Sweetener Options: I recommend an erythritol based sweetener for the cake, because allulose can make it brown much faster. A loaf cake like this takes a long time to bake, so it can become overly dark. The sides against the pan may even taste burnt.
If you are looking to cut back on erythritol, try using only 1/3 to 1/2 cup, and sweetening the rest with pure stevia or pure monk fruit extract.
For the glaze, you can use whatever powdered sweetener you like best.
Frequently Asked Questions
Absolutely! Key limes are hard to find so you can use regular or small Persian limes instead.
Although they are slightly sweeter and less tart than regular limes, key limes can be used in keto recipes. The juice has only about 3g of carbs per ounce (two tablespoons).
This keto key lime pound cake recipe has 7.8g of carbs and 3g of fiber per serving. That comes to 4.8g net carbs per slice.
More delicious keto lime recipes
Keto Key Lime Pound Cake
Ingredients
Cake
- 3 cups almond flour
- 1/3 cup unflavored whey protein powder, or egg white protein powder
- 2 1/2 tsp baking powder
- 1/4 tsp salt
- 1/2 cup butter
- 2/3 cup granular sweetener
- 3 large eggs
- 1/3 cup key lime juice
- 1/4 cup water
- 2 tsp key lime zest
Glaze
- 3 tbsp powdered Swerve Sweetener
- 2 to 3 tsp key lime juice
Instructions
Cake
- Preheat oven to 325ºF and grease a 9×5 inch loaf pan very well.
- In a medium bowl, whisk together the almond flour, protein powder, baking powder, and salt.
- In a large bowl, beat the butter and sweetener together until lightened and fluffy. Beat in the eggs until well combined.
- Beat in half of the almond flour mixture, then beat in the lime juice, water, and lime zest. Finally, beat in the remaining almond flour mixture.
- Transfer to the prepared loaf pan and bake for 55 to 65 minutes. Cover with foil at about the halfway point to make sure the top doesn't get overly browned. The cake is done with the edges are golden and the top is firm to the touch.
Glaze
- Whisk the powdered sweetener and lime juice together until smooth. Drizzle over the cooled cake.
Notes
Nutrition
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Hi , could I just use limes instead of the Key Lime Juice ? Thanks.
Sorry should have read through the notes about the limes 😊
I too am wondering about the water/almond milk question. This sounds delicious! Love your recipes and site! Thanks
Fixed!
Your instructions list water. but say to beat in almond milk. Will either work?
Just use water, I forgot to change that in the instructions… holdover from the older recipe!
Just checking in on ingredients. You list 1/4 cup water, then discuss using almond milk. I assume the almond milk should be the correct item to use.?
I don’t see almond milk in the ingredients. How much almond milk?
Just use water, I forgot to change that in the instructions… holdover from the older recipe!
You can buy bottles of key lime juice.
Yes, I am aware. Please read the blog post and see that the recipe links to the bottled version… I am giving people options.
This is lovely, I love lime too but I’m looking for a keto pound cake recipe that uses butter, not cream cheese. I want to make strawberry short cake with pound cake. Do you have any advice? Thank you for all you do for us keto recipe seekers!
Just made this today and it was so moisty and tasty! I felt a bit adventurous and added some desiccated coconut to the mix (added some more liquid as well so it wasn’t dry which worked really well with the lime.
I can see this cake working well with many flavours. I’ll be making it again ❤️
made this cake today and wow! I was a bit afraid it might taste healthy, but not at all! it tastes even better then a normal butter cake! so full of many different flavours and so moist ❤️
hai, can I use toned milk instead of oatmilk?
I don’t know what toned milk is and this recipe doesn’t use oat milk.
Is there a reason to wait 45 minutes to cover the pound cake with foil after transferring it to the loaf pan?
You cover it 45 minutes into the baking process so it doesn’t over-brown.
“Transfer to the prepared loaf pan and cover with foil after 45 minutes.”
Does this mean to let the mixture rest before covering with foil and then baking?
No, it means to cover with foil 45 minutes into baking.
This was unclear to me too. Glad it was discussed in this chat. I’m off to finish the cake!
Loved this recipe, the flavour of the lime through the cake and the glaze was delicious. The size of the cake was also fabulous it has a good depth to it and the texture is amazing.
What did you use, water, almond milk, both?
Just use water, I forgot to change that in the instructions… holdover from the older recipe!