Lemon Posset (keto, sugar-free)

Lemon posset is a classic British dessert known for its smooth, creamy texture and bright, refreshing lemon flavor.

It’s an elegant and impressive dessert that’s surprisingly easy to make, requiring only a few simple ingredients and minimal effort. This makes it a perfect choice for dinner parties or any special occasion where you want to wow your guests without spending hours in the kitchen.

Plus, it is sugar-free and keto-friendly! Enjoy the luxurious creaminess of lemon posset without compromising on your health goals.

The recipe requires:

4 Ingredients

Active cooking time: 20 minutes

Total cooking time: 3 hours 30 minutes

sugar-free keto lemon posset recipe, lemon mousse with berry compote

Table of Contents

Why you will love this!

  • Effortless Elegance: Surprisingly easy to make with just a few ingredients, it’s perfect for impressing without the stress.
  • Naturally Thickened: No gelatin needed! The cream thickens naturally with a simple combination of cream and lemon juice.
  • Keto & Diabetic-Friendly: Celebrate this beautiful dessert guilt-free! This recipe is naturally sugar-free, with only 1.7 g net carbs per serving, making it ideal for keto and diabetic diets.
  • Light & Refreshing: Unlike heavy, decadent desserts, lemon posset offers a light and refreshing end to a meal. Its bright citrus notes cleanse the palate and leave you feeling satisfied, not overwhelmed.
  • Make-Ahead: Prepare this dessert in advance and let it chill in the refrigerator. It’s perfect for those busy days when you want a delicious dessert ready to go.
sugar-free keto lemon posset recipe, lemon mousse with cherry compote

Lemon Posset Recipe

Ingredients

For the lemon posset recipe, you’ll need the 4 ingredients:

Heavy Cream: the base of the posset,  that provides a rich and creamy texture. Opt for heavy cream with at least 33% fat content to ensure a rich and decadent result.

Lemons: add brightness and help set the posset.

Low-Carb Sweetener:  The best sweetener depends on your needs, here are some options: 

  • Allulose: Mimics sugar is perfect, and has no aftertaste. About 70% as sweet as sugar.
  • Erythritol: Zero-calorie, can crystallize, best combined with allulose. About 70% as sweet as sugar.
  • Monk Fruit: Natural, zero-calorie, slightly fruity, and may have a mild aftertaste. Up to 250 times sweeter than sugar (depending on the extract).
  • Xylitol: Clean sweetness, smooth texture, potential cooling effect, toxic to dogs. About as sweet as sugar. 
  • Stevia: Natural, zero-calorie, can have a strong aftertaste, best in blends. Up to 300 times sweeter than sugar (depending on the extract).
  • Honey/Maple Syrup: Adds unique flavor, but contains sugar, impacts blood sugar. Suitable for a paleo diet, but not for a ketogenic diet. 

Berries (optional): Though optional, berries add a refreshing touch to the rich lemon posset. They create a beautiful contrast and enhance the overall flavor experience.

*you’ll find the exact measurements in the recipe card below.

Equipment

You’ll only need:

  • 2 small-medium saucepans
  • Lemon squeezer
  • Citrus grater/microplane or regular box grater
  • Spatula
  • Serving cups/glasses

Instructions​

Make Berry Compote (optional)

While this Lemon Posset is great on its own, a little berry compote takes it to a whole new level. It adds a gorgeous pop of color and makes each serving look like a fancy dessert straight from a restaurant!

To make berry compote:

  1. Toss your favorite berries (fresh or frozen) into a saucepan with a touch of sweetener. I love blueberries, raspberries, cherries or even a mixed berry!
  2. Let the berries cook over medium heat, stirring now and then. In about 10 minutes, they’ll turn into a juicy compote.
  3. Let that compote cool completely, then pop it in the fridge. This is essential to prevent it from affecting the posset’s setting.

Make Lemon Posset base

This part is all about transforming simple ingredients into a velvety smooth, tangy delight.

  1. In a saucepan, combine heavy cream, lemon zest, and your favorite sweetener. The zest will infuse the cream with its bright, fragrant oils.
  2. Bring the mixture to a boil, then lower the heat and simmer gently. Keep stirring, and watch as it thickens and reduces to about one cup. Use measuring cup for precise measurement.

When the lemon cream is ready?

To determine if the lemon cream is ready while it’s still on the stove, follow these cues:

  • Thickening: The cream should thicken slightly as it simmers. It should coat the back of a spoon, and when you run your finger across the coated spoon, the line should remain clear.

  • Reduction: The mixture should reduce to about one cup. This is a visual cue, but you can also use a measuring cup to confirm the volume.

  • Sugar Dissolution: All the sugar should be completely dissolved. You can check this by stirring the mixture and ensuring there are no gritty sugar granules remaining.

Remember that the cream will continue to thicken slightly as it cools. So, don’t overcook it on the stove. Once it reaches the desired consistency and volume, remove it from the heat and proceed with the recipe.

Off the heat, stir in a lemon juice. 

For an ultra-silky texture, strain the mixture through a fine-mesh sieve. This removes any bits of zest, leaving you with pure, velvety dessert.

Let the lemon cream cool before assembling your possets.

lemon posset recipe

Layer the Posset

Ready to bring it all together? Here’s how to create those beautiful layers.

Spoon that chilled berry compote into the bottom of your serving glasses. Gently pour the lemon cream on top. 

 

sugar-free keto lemon posset with blueberry compote recipe
pour in heavy cream mixture

Pop those glasses in the fridge for at least 2-3 hours, but overnight is even better. 

And there you have it! A simple yet stunning dessert that’s sure to impress. Enjoy every spoonful!

sugar-free keto lemon posset recipe

Top Tips

  • Portion Control: As lemon posset is quite rich, I recommend serving it in small portions, such as 60 ml (2 oz.) cups or ramekins. This allows for a satisfying taste without being overly indulgent.
  • Quality Ingredients: Use fresh lemons for the best flavor and aroma. Heavy cream with a high fat content will create a richer, more luxurious posset.

  • Don’t Overcook the Cream: Simmer the cream mixture gently until it thickens slightly but don’t let it boil vigorously. Overcooking can result in a grainy texture.

  • Zest carefully: When zesting the lemon, avoid the white pith as it can add bitterness.

  • Strain for Smoothness: While optional, straining the lemon cream after adding the juice removes any zest or small bits of curd, resulting in a perfectly smooth texture.

  • Chill Thoroughly: Allow the posset to set in the refrigerator for at least 3 hours, or ideally overnight. This ensures a firm and creamy consistency.

  • Serve Chilled: Lemon posset is best served chilled. The cool temperature enhances its refreshing flavor and creamy texture.

  • Get Creative with Toppings: While delicious on its own, lemon posset can be elevated with a variety of toppings. Fresh berries, whipped cream, shortbread cookies, or a drizzle of honey are all excellent choices.

  • Make Ahead: Lemon posset can be prepared a day or two in advance, making it a convenient dessert for entertaining.

  • Experiment with Flavors: While classic lemon posset is a crowd-pleaser, you can experiment with other citrus fruits like lime or orange for a unique twist.

sugar-free keto lemon posset recipe, lemon mousse with cherry compote

Toppings

Top your vibrant lemon posset with:

  • Fresh berries: blueberries, strawberries, raspberries, or any other desired berries and fresh fruit.
  • Berry compote
  • Almond flour cookies
  • Lemon curd 
  • Almond slices
  • Coconut flakes
  • Whipped cream 
  • A dollop of Greek yougurt
  • Mint leaves
  • Chocolate shavings 
  • Drizzle with berry sauce or berry compote, caramel, or your favorite jam (strawberry chia jam or blueberry jam).

Get creative and enjoy!

sugar-free keto lemon posset recipe, lemon mousse with cherry compote

Recipe variations

While the classic lemon posset is a delightful treat, don’t be afraid to experiment with different flavors and spices to create your own unique variations. Here are some ideas to inspire you:

Citrus Swaps: Swap the lemons for other citrus fruits! Try lime for a zesty, tangy twist, or blood orange for a beautiful color and slightly sweeter flavor profile. You can even combine citrus fruits for a more complex flavor experience.

Herbal Infusions: Infuse the cream with herbs like lavender, rosemary, or thyme. Simply add a sprig or two to the cream while simmering, then remove before adding the lemon juice.

Spiced Sensations: Add warmth and depth with spices like cinnamon, cardamom, or ginger. A pinch or two added to the simmering cream will create a comforting and aromatic dessert, perfect for autumn days.

Vanilla Posset: Scrape the seeds from a vanilla bean into the cream for a classic and comforting aroma.

FAQ

Lemon Posset with berries: Nutritional information

Servings: 4 small cups (60 ml/2 oz)

Nutritional value per serving:
 
Calories 221
 
Protein 0.3 g
 

Total carbohydrate 5.4 g

Dietary fiber 0.9 g

Total sugars 3.7 g

Net carbs 4.5 g

Total fat 24.1 g

Saturated fat 12 g

Cholesterol 80 mg

 

Nutritional disclaimer: The nutritional value provided is based on general information and should not be considered as a substitute for professional dietary advice or medical guidance. The values are derived from reputable sources, such as food databases or nutritional labels, but there may be variations in nutrient content depending on factors such as brand, preparation methods, and serving sizes.

 

How to store lemmon posset?

To keep your lemon posset tasting its best, cover each serving individually with plastic wrap or a lid. Store the covered possets in the refrigerator for up to 5 days.

Avoid freezing the posset as this can affect its texture.

How to reduce calories in the recipe?

Here are some tips to reduce calories in your lemon posset:

  1. As mentioned before, serving the posset in smaller portions (2 oz. or 60 ml) is a great way to control calorie intake without sacrificing the deliciousness.
  2. Increase the proportion of fruit compote to lemon cream in each serving. This adds volume and sweetness with fewer calories.
  3. Consider adding a layer of Greek yogurt, this adds protein and a tangy flavor, and it can help you feel more satisfied with a smaller portion of the richer cream.

How to fix unset posset?

If your lemon posset hasn’t set properly, there are a few things you can try to fix it:

  • Add more acid: Gently reheat the unset posset in a saucepan over low heat. Gradually whisk in additional lemon juice, a teaspoon at a time, until the mixture starts to thicken. Be careful not to overheat the posset or it may curdle.
  • Re-heat and whisk: If the cream wasn’t heated enough initially, gently reheat the posset while whisking continuously. This might encourage the proteins to interact with the acid and set the posset.
  • Add a small amount of gelatin: As a last resort, you can try adding a small amount of dissolved gelatin to the posset. Bloom the gelatin in cold water, then melt it over low heat or in the microwave. Whisk a small amount into the posset and refrigerate again to see if it sets.

What's the difference between posset and panna cotta?

Posset and panna cotta, while both creamy desserts, differ in key ways:

  • Thickening: Posset sets using citrus acid, while panna cotta relies on gelatin.
  • Texture: Posset is light and airy, panna cotta is denser and smoother.
  • Flavor: Posset is citrus-forward, panna cotta is more neutral, allowing for varied flavor additions.
  • Preparation: Posset is very simple, panna cotta involves additional gelatin steps.

In short, posset is a quick, light, citrusy dessert, while panna cotta is denser, more versatile, and requires a bit more effort.

 
 

What's the difference between posset and mousse?

Here’s a breakdown of the key differences between posset and mousse:

  • Thickening Agent: Posset sets using the acidity of citrus juice, while mousse relies on whipped egg whites or cream, often with the addition of gelatin.

  • Texture: Posset has a light, creamy, and airy texture. Mousse is also light and airy but can range from fluffy to dense depending on the recipe.

  • Flavor: Posset is primarily citrusy, with optional additions for other flavors. Mousse has a wider variety of flavors, both sweet and savory.

  • Preparation: Posset is very simple to make with minimal ingredients and steps. Mousse requires more effort, involving whipping and often folding ingredients.

Try these keto desserts next:

Thank you for giving this recipe a 5-star review!

sugar-free keto lemon posset recipe, lemon mousse with cherry compote

Lemon Posset

Yield: 2 large (120 ml/4 oz.) or 4 small (60 ml/2 oz.) servings
Prep Time: 5 minutes
Cook Time: 25 minutes
Chill Time: 3 hours
Total Time: 3 hours 30 minutes

Lemon Posset: Simple to make, elegant to serve. Its creamy texture and bright lemon flavor make it perfect for any occasion!

Ingredients

  • 1 cup (240 ml) heavy cream
  • 1/4 cup (60 g) erythritol or other sweetener*
  • 3 tbsp. (1/6 cup/40 ml) lemon juice of one lemon
  • Lemon zest of 1 lemon

Berry Compote (optional)

  • 1 cup (150 g) berries (fresh or frozen)
  • 1 tbsp. erythritol or other sweetener

Instructions

Optional Berry Compote:

  1. In a saucepan, combine your desired berries and preferred sweetener.
  2. Cook over medium heat for about 10 minutes, stirring occasionally, until the berries soften and release their juices.
  3. Set aside to cool completely, then refrigerate for the best flavor and texture.

Lemon Cream:

  1. In a separate saucepan, combine heavy cream, lemon zest, and sweetener.
  2. Bring to a boil, then reduce heat and simmer for 8-10 minutes, stirring frequently, until the sweetener dissolves completely. Keep the mixture at a gentle simmer, adjusting heat as needed, and reduce it to one cup. You can transfer the mixture to a measuring cup to check the volume.
  3. Remove from heat and stir in lemon juice.
  4. Optionally, strain the mixture through a fine-mesh strainer to remove the zest. Let the cream cool to room temperature for 10-15 minutes.

Assembling the Posset:

  1. Spoon the chilled berry compote into the bottom of serving glasses.
  2. Carefully pour the lemon cream mixture on top.
  3. Refrigerate for at least 2-3 hours, or ideally overnight, until set.
  4. Before serving, top with your desired toppings, such as berry compote, fresh berries, or cookies.

Enjoy!

Notes

    Sweetener:  The best sweetener depends on your needs,  here are some options: 

  • Allulose: Mimics sugar is perfect, and has no aftertaste. About 70% as sweet as sugar.
  • Erythritol: Zero-calorie, can crystallize, best combined with allulose. About 70% as sweet as sugar.
  • Monk Fruit: Natural, zero-calorie, slightly fruity, and may have a mild aftertaste. Up to 250 times sweeter than sugar (depending on the extract).
  • Xylitol: Clean sweetness, smooth texture, potential cooling effect, toxic to dogs. About as sweet as sugar. 
  • Stevia: Natural, zero-calorie, can have a strong aftertaste, best in blends. Up to 300 times sweeter than sugar (depending on the extract).
  • Honey/Maple Syrup: Adds unique flavor, but contains sugar, impacts blood sugar. Suitable for a paleo diet, but not for a ketogenic diet. 

Nutrition Information:
Yield: 4 Serving Size: 60 ml/2 oz
Amount Per Serving: Calories: 207Total Fat: 22.2gSaturated Fat: 13.8gCholesterol: 82mgSodium: 23mgCarbohydrates: 1.7gNet Carbohydrates: 1.7gFiber: 0gSugar: 0.1gProtein: 1.2g

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