This perfectly sweet and tangy Keto Lemon Curd is easy to make and absolutely delicious. It has bright and bold lemon flavor and a silky smooth texture. Use in a number of sugar-free desserts or spread it over your favorite low carb biscuits or toast.

❤️ Why You’ll Love this Keto Lemon Curd Recipe

• Bright and bold lemon flavor
• Silky smooth texture
• Perfectly sweet with the right amount of tanginess
• Sugar-free
• Used in so many Keto desserts

What do you do when life gives you lemons?  Make lemon curd, of course!  I absolutely love lemons, in drinks, in desserts, in savory dishes, pretty much any way I can get them.  They have such a fresh and clean smell that I can’t get enough of.

If you have never made lemon curd before, it’s a soft and smooth spread type custard filling often used in tarts and as a filling in pastries. This sugar-free lemon curd is a Keto friendly version that is every bit as delicious as the traditional, without all the sugar or carbs.

Spread over your favorite low carb toast or biscuits, or use in a number of Keto desserts, which I’ve listed down below. Be sure to scroll down and check them out.

🛒 Ingredients for Keto Lemon Curd

• Lemon juice
• Lemon zest
• Monk fruit/allulose
• Unsalted butter
• Eggs
• Salt

*Exact measurements are listed in the recipe card below.

🥣 Recommended Tools

• Saucepan
• Whisk

🔪 How to Make Sugar-Free Lemon Curd

Add the butter to a saucepan on very low heat and whisk in the sweetener.

Whisk in the eggs.

Then the salt, lemon juice and lemon zest.

Tip: The key to this curd coming out smooth and creamy, is to whisk the entire time!

Turn the heat up to medium-low and cook for about 6-8 minutes, whisking the entire time, or until it thickens enough to coat the back of a spoon. You can tell it’s ready when you swipe your finger through it (as pictured above) and the curd should stay separated.

Remove from the heat and cover with plastic wrap, making sure it’s actually touching the curd (to prevent a skin from forming).

Chill in the fridge for about an hour before using.

☑️ Storage Instructions

Store leftover lemon curd in an airtight jar for up to a week or freeze.

🍴 Ways to Serve Lemon Curd

• Spread over some Keto Biscuits.
• Toast a slice of this Keto Brioche Bread and smear some on top.
• Spread some in between layers of Buttermilk Pancakes.
• Add a dollop on top of these Keto Waffles and add a few blueberries. Delish!
• Mix in with some plain Greek yogurt for a punch of lemon flavor.
• Layer in a parfait with some Homemade Keto Granola.
• Spoon some over this Cheesecake Fluff for added flavor.
• Using as a filling for these Keto Crepes.

💡 Tips on Making Lemon Curd

• Use fresh lemons ONLY! Since lemon juice is the star ingredient in this recipe, this is not the time for using the bottled stuff. Personally, I don’t think it’s ever a good time for that stuff! You also need a good amount of lemon zest that you can only get from fresh lemons.
• Don’t rush making this curd. I cannot stress this enough. It doesn’t need to cook for that long, so trust me it’s worth taking your time. Similar to most custards, low and slow is best, otherwise you risk scrambling the eggs, which you definitely don’t want. Now if that happens, where you find you have little bits of scrambled eggs in your curd, don’t panic, just run the curd through a fine mesh sieve and it will strain those bits out.
• You need to make sure you’re whisking or stirring the curd while it’s cooking. Don’t be tempted to walk away from it, because you might come back to a scrambled mess. Ask me how I know…
• If you are short on time, you can make my 5 Minute Microwave Lemon Curd instead. It’s super easy to make and have all the same great flavors of this traditional stove top method.
• If you don’t have monk fruit/allulose, you can use all monk fruit at a 1:1 ratio. If you only have allulose, use 1 cup instead, as allulose isn’t quite as sweet as monk fruit. Once it’s cooked through and you taste it, if you feel it needs to be a little sweeter, you can always add in a few drops of liquid stevia.
• If you like limes more than lemons or happen to have an abundance of them, you can make this Lime Curd recipe instead.
• If you like to make lemon desserts a lot, I highly recommend making a double batch of this lemon curd and freeze some for later. Then, when you see a recipe you want to make, just thaw out the curd and you’ll be ready to go.

🔄 Keto Desserts That Use Lemon Curd

• Lemon Meringue Cupcakes
• Lemon Cheesecake Mousse
• Lemon Cupcakes
• Lemon Mascarpone Tart
• No-Churn Lemon Ice Cream
• Lemon Curd Layer Cake
• Mini Lemon Curd Tarts
• Lemon Curd Thumbprint Cookies

Is Lemon Curd and Lemon Pie Filling the Same?

Both lemon curd and lemon pie filling have a delicious lemony flavor, but the texture and uses are different. Lemon pie filling uses cornstarch to thicken the mixture and has a thicker texture than lemon curd.

Lemon curd has a more intense lemon flavor and is thickened with eggs and additional butter than what pie filling uses.

Does Lemon Curd Contain Sugar?

The classic version does contain sugar, so it’s not idea for a low carb diet. However, this Keto Lemon Curd uses a Keto friendly sweetener that has zero net carbs, making it ideal for Keto.

Is Lemon Curd High in Carbs?

Since the traditional version contains sugar, yes it would be too high in carbs for Keto.

Is Lemon Keto Friendly?

They absolutely are! In fact, lemons are recommended on Keto because of their many health benefits. Where you typically avoid a lot of citrus fruit on Keto, lemons are the exception.

Is Lemon Curd Keto Friendly?

Lemons are naturally low in sugar, a great source of Vitamin C and contain antioxidants that promote healthy digestion and aid in fluid retention. So it’s not only healthy, but because this curd is made using a sugar-free sweetener, it’s ideal for Keto. There’re many other great health benefits discussed in this article on Healthline.

Can I Freeze Lemon Curd?

You sure can. In fact, when frozen in an air tight container it can last up to several months without effecting the taste or quality. That makes it a great make a head recipe for meal prepping desserts in advance.

To thaw, move the container from the freezer to a refrigerator over night. After you have thawed it, you can store it in the refrigerator for a couple of weeks.

🍽️ More Keto Lemon Recipes

• Lemon Bars
• Strawberry Lemonade Cake
• Lemon Cheesecake Mousse
• Lemon Poppy Mini Bundt Cakes
• Lemon Cupcakes
• Blueberry Lemon Muffins

*Originally published on May 9, 2018, updated on October 9, 2026 with improvements to the recipe, new photos, new recipe information and helpful tips.