Published: May 10, 2018 · Modified: Apr 5, 2023 by Carolyn

Keto Lemon Curd

Name: Keto Lemon Curd Recipe
Prep time: 5 min
Cook time: 15 min
Total time: 20 min
Ingredients: 3 large eggs; 1/3 cup Swerve Confectioners; 3 tbsp allulose (or BochaSweet (use granular varieties)); 2 teaspoons grated lemon zest; 1/3 cup freshly squeezed lemon juice; 1/4 cup butter (cut into 3 or 4 pieces)

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Lemon lovers, rejoice! Easy Keto Lemon Curd takes only 4 ingredients and is the creamiest, dreamiest lemon dessert sauce. And it has less than 1g of carbs per serving!

A bowl of keto lemon curd with a dark teal napkin and lemons.

I’ve been making my own sugar free lemon curd for what feels like a gajillion years now. I made my first batch in 2011 and was astonished that it worked out so well. And I’ve been improving upon that recipe ever since.

It’s one of those recipes that always surprises me when I taste it. I seemingly forget how much I like keto lemon curd between batches. And then when I make it again, I wonder why I don’t make it more often.

If you love lemon, I dare you not to eat the whole batch in one sitting. If you can resist the temptation, then you can use it to make Keto Lemon Curd Tart. Or spread it over Keto Cheesecake for an out-of-this-world keto dessert experience!

A hand spooning keto lemon curd out of a glass bowl.

Why you need to try it

When I embarked upon writing the Easy Keto Desserts cookbook, I struck upon a trick for making sugar free lemon curd even easier than before: using whole eggs.

Typically, lemon curd calls for just the yolks. But using the whole egg works just as well and eliminates the step of separating the yolks from the whites. Less fuss, less muss, and nothing sitting in your fridge, waiting to be used up.

I’ve been making it this way ever since. It’s a little creamier and a little fluffier, and it doesn’t curdle quite as easily. And it takes only 20 minutes to make!

Reader Reviews

“I love this recipe. I can’t count how many times I’ve made it. Today I was out of fresh lemons, so I made it with bottled key lime juice and it was awesome. Thank you!!!” — Martha

“Amazing recipe!! Much easier than the lemon curd I used to make before I went keto!” — Sarah

“Wow, this stuff is delicious! I could sit and eat it with a spoon. I doubled the recipe and it took about 20 minutes to get thick. I can’t wait to make your ice cream with it!” — Becky

Ingredients you need

Top down image of ingredients needed for sugar-free lemon curd.

Lemons: Curd uses both the zest and the juice of the lemons. Make sure to wash the lemons well before zesting.
Eggs: No need to separate the eggs for this easy keto lemon curd recipe!
Butter: This helps firm up the curd and makes it extra creamy. You can also use coconut oil for a dairy-free version.
Sweetener: I find that a combination of Swerve Confectioners and allulose gives the best results. See the Expert Tips section for more options.

Step by Step Directions

A collage of four images showing how to make Keto Lemon Curd.

1. Use a double boiler: Set a glass or ceramic bowl over a pan of barely simmering water.

2. Whisk and cook: Whisk together the eggs, sweeteners, lemon juice, and lemon zest. Whisk continuously until the mixture thickens, about 10 minutes. Watch carefully as it will thicken all of a sudden.

3. Add butter: Immediately remove from heat and add the butter. Let sit a few minutes to melt and then whisk until smooth and creamy.

4. Refrigerate: Chill in the refrigerator for 2 hours to set.

Top down image of a glass bowl filled with keto lemon curd, surrounded by lemons.

Expert Tips

Always use a glass or ceramic bowl when making lemon curd. Lemon juice reacts with metal bowls and can give the curd a tinny or metallic taste.

The trick to perfect keto lemon curd is to take it off the heat at just the right moment. Keep a close eye on it at all times. The mixture will start to move more slowly and your whisk will begin to make tracks through it. The mixture will also become more opaque. Once it does, remove the bowl from over the pan to stop the cooking process.

Sweetener options: Curd relies on eggs to set properly so you can use your preferred sweetener. But do note that curd made with allulose alone takes a long time to thicken properly. It also stays a lot softer, even after refrigeration. Do not use liquid allulose, as it will introduce too much liquid into the mixture.

Using erythritol based sweeteners alone will cause some recrystallization. This is why I recommend a combination of sweeteners like Swerve and allulose.

Dairy-free option: You can make dairy-free lemon curd by replacing the butter with coconut oil. Use only 3 tablespoons in place of the ¼ cup of butter.

A glass bowl filled with sugar free lemon curd with sliced lemons in the background.

Frequently Asked Questions

Does lemon curd have carbs?

Conventional curd has about 20g of carbs per serving of 2 to 3 tablespoons. However, this keto lemon curd recipe has only 0.7g carbs per serving. So you can enjoy it with abandon!

How long does lemon curd last?

Homemade lemon curd can be refrigerated in an airtight container for up to 7 days. I recommend storing it in glass jars so that the acidity doesn’t react with the container. You can freeze this sugar free lemon curd, but it does change consistency a little during the freezing and thawing process.

Is it possible to can homemade lemon curd?

I have not tried canning this sugar free lemon curd but it should work. Lemon has a great deal of acidity, which significantly reduces the risk of spoilage and contamination. Make sure your jars seal properly and store in a cool dark place for up to 3 months.

Close up shot of keto lemon bar cookies on a white plate.

How to use Keto Lemon Curd

So once you’ve made this sweet and tangy lemon spread, what do you do with it? I mean, besides just eating it with a spoon! Here are some delicious ideas:

Use as a spread for keto scones. It’s amazing with keto blueberry muffins too!
Serve as alternative to syrup for almond flour keto pancakes.
Make this gorgeous Keto Lemon Lush.
Use it as the filling for Keto Lemon Bar Cookies.
Churn up a batch of Keto Lemon Ice Cream.

Keto Lemon Curd Recipe

Lemon lovers, rejoice! Easy Keto Lemon Curd takes only 4 ingredients and is the creamiest, dreamiest lemon dessert sauce. And it has less than 1g of carbs per serving!

4.92 from 108 votes

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Course: Dessert

Cuisine: Dessert

Keyword: keto lemon curd, sugar free lemon curd

Prep Time: 5

Cook Time: 15

Total Time: 20

Servings: servings

Calories: 82kcal

Ingredients

3 large eggs
⅓ cup Swerve Confectioners
3 tablespoon allulose or BochaSweet (use granular varieties)
2 teaspoons grated lemon zest
⅓ cup freshly squeezed lemon juice
¼ cup butter cut into 3 or 4 pieces

Instructions

Set a glass or ceramic bowl over a pan of barely simmering water.
Whisk together the eggs, sweeteners, lemon juice, and lemon zest. Whisk continuously until the mixture thickens, about 10 minutes. Watch carefully as it will thicken all of a sudden.
Immediately remove from heat and add the butter. Let sit a few minutes to melt and then whisk until smooth and creamy.
Refrigerate 2 to 3 hours to firm up.

Video

Notes

Storage Information: Store the curd in a glass jar in the fridge for up to a week.

Sweetener Options: I find that a mix of erythritol and allulose or BochaSweet produces the best results. It firms up nicely but doesn’t recrystallize. You can use whatever you like best but know that the consistency may change. Use a powdered sweetener if using erythritol, to reduce grittiness.

Nutrition Facts

Keto Lemon Curd Recipe

Amount Per Serving (3 tbsp)

Calories 82 Calories from Fat 63

% Daily Value*

Fat 7g11%

Carbohydrates 0.8g0%

Fiber 0.1g0%

Protein 2.45g5%

* Percent Daily Values are based on a 2000 calorie diet.

Please note that I am not a medical or nutritional professional. I am simply recounting and sharing my own experiences on this blog. Nothing I express here should be taken as medical advice and you should consult with your doctor before starting any diet or exercise program. I provide nutritional information for my recipes simply as a courtesy to my readers. It is calculated using MacGourmet software and I remove erythritol from the final carb count and net carb count, as it does not affect my own blood glucose levels. I do my best to be as accurate as possible but you should independently calculate nutritional information on your own before relying on them. I expressly disclaim any and all liability of any kind with respect to any act or omission wholly or in part in reliance on anything contained in this website.

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