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Keto Lemon Posset (4-Ingredient Dessert)

Published Apr 8, 2019 By Julia 2 CommentsThis post may contain affiliate links.

Lemon possets are a no-bake, creamy citrus dessert with only 3 main ingredients (cream, lemon, and a sweetener) plus a 4th ingredient for the berry topping. It’s an easy-to-make treat to satisfy sweet cravings, great for anyone on keto and low carb diets.

keto lemon posset dessert topped with blueberries

Taste & Texture

This lemon posset is very sweet with concentrated lemon flavors (like lemon keto fat bombs), and is served in small portions. It’s topped with fresh blueberries, which adds extra tartness.

The texture is that of a silky and luscious cream, incredibly smooth and velvety. It’s much thicker than a traditional pudding, custard, or mousse.

The key to a perfect lemon posset is managing the delicate balance between all three ingredients — cream, lemon juice, and the sweetener — for the ideal creamy texture and bright lemon flavor. I experimented with these ingredient ratios by adapting from America’s Test Kitchen, which was the inspiration for this recipe.

scooping up no bake lemon curd pudding

Note About Sweeteners

This recipe is designed for confectioners (powdered) swerve, and hasn’t been tested with other sweeteners. In most of my recipes, it’s not a problem if you substitute with other powdered sweeteners that also measure the same as swerve, but I don’t recommend doing so in this case, given the sweetener’s crucial role in getting the right taste and texture (and avoiding erythritol crystallilzation) in a lemon posset. I also caution against using liquid sweeteners or sweeteners that don’t measure the same as swerve.

Two common misunderstandings:

  • Swerve is not the same as erythritol. Swerve is an erythritol blend that measures 1:1 as sugar, whereas pure erythritol is only about 70% as sweet as sugar. You cannot equally substitute one for the other.
  • Swerve and other erythritol blends are sugar alcohols and are non-impact, meaning that their carbohydrates are not digested by the body. When you’re calculating net carbs, you should subtract out their carbs just like you would for fiber.
overhead view of 3 low carb lemon possets

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Keto Lemon Posset

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Prep Time: 20 mins
Cook Time: 5 mins
Cooling: 3 hrs 30 mins
Total Time: 25 mins
Servings: 3 lemon possets
Calories: 280

DESCRIPTION

Keto lemon possets are a no-bake, creamy citrus dessert with only 3 main ingredients (cream, lemon, and a sweetener) plus a 4th ingredient for the berry topping.

INGREDIENTS

  • 1 cup heavy whipping cream
  • 1/4 cup (1 1/2 oz) confectioners swerve sweetener (measure by weight for best results; if using volume, it should be loosely packed)
  • 1 large lemon
  • 1/3 cup (2 oz) fresh blueberries (other berries or a mix of them would work too, like raspberries or blackberries)

INSTRUCTIONS

  • Grate the lemon until you have 1 tablespoon of grated lemon zest, taking care to avoid the bitter white pith of the peel. Cut and squeeze the lemon until you have 3 tablespoons of fresh lemon juice.
  • In a medium saucepan (I use a 7-inch wide and 3.5-inch tall nonstick pan), add heavy cream, swerve, and 1 tablespoon of lemon zest. Don’t add the lemon juice. Avoid smaller saucepans because the cream will take up significant volume once it starts to boil.
  • Place the saucepan over medium-high heat. While waiting for the mixture to come to a boil, stir constantly to dissolve the sweetener, about 1 minute.
  • When a rapid foamy boil is established, stir frequently and decrease the heat as needed to maintain a steady boil. Watch carefully to avoid boiling over. When 5 minutes of foamy boiling have elapsed, immediately turn off the heat and pour the mixture into a heatproof measuring glass. The mixture should be reduced to just shy of 1 cup; if you have more than that, pour the mixture back into the saucepan and boil for another 1-2 minutes and measure again.
  • With the mixture in the measuring glass, add 3 tablespoons of lemon juice and stir it in. Let the mixture sit at room temperature for about 30 minutes or until a skin forms on top, keeping it in a cool area away from hot ovens.
  • Using a fine mesh (I use a nut milk bag), strain out all solids including lemon zest, applying pressure to the mesh to squeeze out liquid. Discard the solids. You should be left with a smooth and thick liquid, about 2/3 cup.
  • Evenly divide the liquid among 3 tiny serving glasses or bowls. I use glass prep bowls that can hold about 1/2 cup (4 fl oz) each.
  • Refrigerate them uncovered for 3 hours. Once they’re set, top with blueberries and cover with plastic wrap. Store them in the refrigerator for up to 1 day until ready to serve.

NUTRITION

Makes 3 Servings
Amount Per Serving (1 posset):
Calories 280  
Total Fat 29g 44%
   Saturated Fat 18g 91%
Cholesterol 90mg 30%
Sodium 20mg 1%
Net Carb 5.5g  
Total Carb 6g 2%
   Dietary Fiber 0.5g 2%
   Sugars 4.5g  
Protein 2g  
Vitamin A 23% · Vitamin C 4% · Calcium 5% · Iron 0%
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Keto Fudge Keto Fudge
Lemon Cheesecake Fat Bombs with Cream Cheese Keto Lemon Fat Bombs
Keto Peanut Butter Cookies Keto Peanut Butter Cookies
Keto Ice Cream Keto 4-Ingredient Ice Cream

Filed Under: 5-10g Net Carbs Per Serving, Low Carb & Keto Copycat Recipes, Low Carb & Keto Desserts, Low Carb & Keto Vegetarian Recipes Tagged With: 1-5ingredients, blueberries, erythritol, gluten free, heavy cream, lemon, more60min, stovetop, vegetarian

About Julia

ABOUT THE AUTHOR
Julia is a low carb recipe developer and the founder of Savory Tooth. Her recipes attract over 1 million readers every month and have been featured in The Huffington Post, Parade, Yahoo, NBC Today, Country Living, and Reader's Digest. Learn more.

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Bengt Glave

Hello! Loved the recipe! Are the blueberries factored in the net carbs given for this recipe?

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Reply
7 months ago
Julia

Yes, the blueberries are included in the nutrition calculation.

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7 months ago

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savory tooth is a food blog featuring delicious recipes for low carb meals. These recipes are easy-to-make and perfect for a keto lifestyle.

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