Keto Frozen Lemonade – Chick-fil-A Copycat
Published July 11, 2020 • Updated March 2, 2026
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If you've been dying for a frozen lemonade at Chick-fil-A, I have a sugar-free solution for you. This frozen lemonade combines creamy low-carb ice cream with sugar-free lemonade to create a creamy milkshake.
Ingredients
2 cups of water -
1 cup ice
-
1/2 cup of freshly squeezed lemon juice or concentrate
-
1/2 cup low-carb vanilla ice cream (see below for keto approved brands)
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1 tablespoon monkfruit or use sweetener of choice
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pinches of salt
Nutrition disclaimer
The nutrition information provided is an estimate and is for informational purposes only. I am a Doctor of Pharmacy (Pharm.D.); however, this content is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Always consult your physician or other qualified health provider before making any lifestyle changes or beginning a new nutrition program.
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Get My Macros + Recipes →Frequently Asked Questions
Can I use bottled lemon juice instead of freshly squeezed lemon juice?
Yes, you can use bottled lemon juice, but freshly squeezed lemon juice usually provides a brighter, fresher flavor. If using bottled, make sure it's 100% lemon juice without added sugars.
What are some good ice cream brands for this recipe?
Some popular keto-approved brands include Halo Top, Enlightened, and Breyers Carb Smart. Just check the labels to ensure they fit your dietary needs!
How can I adjust the sweetness if I prefer a sweeter frozen lemonade?
You can easily adjust the sweetness by adding more monkfruit or another sweetener of your choice. Start with a small amount, blend, and taste before adding more to avoid over-sweetening.
Can I make this recipe in advance?
While it's best enjoyed fresh, you can make it in advance and store it in the freezer. Just give it a good stir or blend again before serving, as it may harden.
Is this recipe suitable for a dairy-free diet?
To make this recipe dairy-free, simply substitute the vanilla ice cream with a dairy-free alternative, like coconut or almond milk ice cream, that fits your dietary preferences.
Chick-fil-A is known for two things: amazing chicken sandwiches and frozen lemonade! Today we’re making a sugar-free version of their creamy lemonade milkshake. This frozen lemonade is the perfect frosty summertime treat. It’s made with low-carb ice cream and sugar-free lemonade, topped with homemade whipped cream.
This creamy lemonade milkshake is lightly sweet and mildly tart. It’s the ideal blend of both flavors.
Lemons are keto! I love cooking and baking with lemons because they add flavor and brighten up a dish. Lemons are loaded with vitamin C and only have 3.4 grams net carbs in one lemon.
This is a copycat Chick-fil-A frozen lemonade recipe, so of course we have to add ice cream to this milkshake! Luckily, there are some great sugar-free ice creams available at the grocery store. Make sure you check the nutrition labels. I find that many brands are still higher in carbs than you’d want. In this recipe, we only add 1/2 cup ice cream for the entire recipe and it serves 4 people, so those carbs don’t add up to much.
Some great vanilla ice cream brands to try:
My favorite blender is by 
Pretty close to the drive-through version. I would start with half a tablespoon of monkfruit instead of the full one, the cooling aftertaste was noticeable until I dialed it back. Second batch nailed it.
My daughter gave me a look when I pulled out the blender, but she drained her glass before I could even pour mine. From a kid who side-eyes everything keto, that's a four-star review.
Side-eyes from a keto skeptic and still first to finish. The fresh lemon is what gets them, even when they're suspicious of the blender.
Start with half the monkfruit and taste before adding more, I almost covered up the lemon tartness on my first batch and that tartness is the whole point.
Low-carb ice cream blended into lemonade sounded like it would ruin both things. I only tried it because I had lemons that needed using and the Chick-fil-A craving was real. The tartness from fresh-squeezed juice cuts through the creaminess in a way I wasn't expecting. Other keto lemonade attempts I've made have that diet-drink aftertaste, but this one doesn't. The monkfruit keeps it sweet without tasting fake. Making this in February feels a little unhinged but the craving doesn't care what month it is.
Ha, I've made this in January. February is practically peak season. Fresh lemon is everything here. Bottled loses that tartness cut and then it just tastes like a sweetened cream float.