Easy Lemon Posset: A Creamy Citrus Dessert Recipe

The easy lemon posset is a silky custard dessert that uses lemon juice, sugar, and cream for a zesty finish. With just 5 ingredients and 20 minutes total, this Irish-inspired dessert delivers restaurant-quality flavor without complexity. Its smooth texture and bright citrus tang make it ideal for springtime desserts, weekend brunch, or any occasion.

Why This Lemon Posset Recipe Works

After perfecting a dozen citrus custard recipes, this lemon posset remains my favorite. The combination of fresh lemon juice and zest creates a bright flavor that balances the cream’s richness. Unlike gelatin-based desserts, the natural emulsion of egg yolks gives it a silky mouthfeel that melts at room temperature.

My breakthrough came when I discovered tempering the egg yolks. This technique prevents curdling and ensures the custard remains smooth even after chilling. The result is a dessert that looks professional using minimal steps—just whisk, cook, and chill. It pairs beautifully with fresh blackberries or a sprig of mint for visual appeal.

Step-by-Step Instructions

1. Whisk Base

   In medium bowl, combine lemon juice, zest, sugar, milk, and cream. Whisk until sugar dissolves (5 minutes).

2. Temper Mixture

   In separate bowl, whisk 4 egg yolks until smooth. Gradually add 1/2 cup of custard mixture to yolks while whisking constantly.

3. Cook Custard

   Return tempered mixture to saucepan. Cook over medium heat, stirring constantly until spoon leaves clean path (80°C/170°F). Do not boil.

4. Chill and Set

   Strain into heatproof bowls. Cover with plastic wrap, pressing directly onto surface. Refrigerate 4 hours until firm.

5. Finish and Serve

   Top with additional lemon zest and whipped cream just before serving. Store covered in fridge.

Chef Tips for Perfect Results

• Always use room-temperature eggs to prevent curdling
• Test readiness at 170°F—slightly warmer than standard custard
• Let custard rest 10 minutes after cooking to clarify
• Strain through metal sieve for ultra-smooth texture
• Whisk continuously for at least 2 minutes post-cooking

Common Mistakes to Avoid

• Scorching: Cook over medium-low heat with occasional stirring. Solution: Keep constant motion with whisk.
• Formation of skin: Never stop whisking—especially after removing from heat. Systematically whisk post-cooking phases.
• Runny texture: Churn at 170°F and refrigerate minimum 3 hours. Check with paring knife before serving.
• Over-seasoning: Taste raw lemon zest first—peel absorbs salt. Grate immediately before measuring.

Serving Suggestions and Pairings

Layer lemon posset under meringue for sophisticated tart presentation. Love shortbread crumble at bottom. For impressive plating, serve in vintage lead crystal goblets with edible flowers. Ideal with afternoon tea or non-alcoholic sparkling citrus water. The tartness pairs exceptionally with fresh figs and blueberries in summer.

Frequently Asked Questions

Can I skip the egg yolks in this posset?

No, egg yolks are essential for the posset’s custard-like structure and silkiness. Substituting with commercial egg replacer will not yield similar results.

How do I tell when the custard is done?

The custard is ready when it coats the back of a spoon cleanly and registers 170°F on a thermometer. It will thicken more as it chills.

Why did my posset develop a skin on top?

This typically happens from uneven cooling or lack of continuous whisking. Return to heat and whisk constantly until skin dissolves.

Can I make this in advance for a dinner party?

Absolutely—prepare up to 24 hours ahead. Store covered in fridge and add fresh zest before serving for optimal presentation.

What can I use to garnish lemon posset?

Try edible flowers like violas or lavender buds for visual pop. Fresh berries or a light dusting of confectioners’ sugar also work well.

Citrus dessert history and no-bake alternatives expand threading options. With fresh lemons and simple tools, you can turn this posset into a showstopping finale for any meal.

Easy Lemon Posset: A Creamy Citrus Dessert Recipe

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Print Recipe

A silky, zesty Irish-inspired custard dessert made with lemon juice, zest, sugar, and cream. This quick 20-minute recipe features a rich mouthfeel and bright citrus finish, perfect for brunch, springtime, or an elegant finale.

• Total Time: 20
• Yield: 4 desserts 1x

Ingredients

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1 cup fresh lemon juice
2 tablespoons lemon zest
1/2 cup granulated sugar
1/2 cup full-fat milk
1/2 cup heavy cream
1 tablespoon honey (optional)
4 egg yolks

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Instructions

Whisk lemon juice, zest, sugar, milk, and cream in a medium bowl until sugar dissolves (5 minutes)
Whisk 4 egg yolks in a separate bowl, then gradually add 1/2 cup of the custard mixture while whisking constantly
Return tempered mixture to a saucepan, cook over medium heat until it coats the back of a spoon (80°C/170°F) without boiling
Strain into heatproof bowls, cover with plastic wrap pressed to the surface, and refrigerate 4 hours until fully set
Top with additional lemon zest and whipped cream before serving

Notes

Use fresh-squeezed lemons for optimal flavor
Avoid contact with bitter lemon pith when zesting
Adjust sugar to taste perception
Full-fat milk/cream ensures ideal texture
Straining removes any cooked lumps before chilling

• Author: Tiramisu Cake
• Prep Time: 10
• Cook Time: 10
• Category: Dessert
• Method: Stovetop
• Cuisine: Irish-Inspired
• Diet: Vegetarian

Nutrition

• Serving Size: 1 dessert
• Calories: 250
• Sugar: 30g
• Sodium: 250mg
• Fat: 15g
• Saturated Fat: 9g
• Carbohydrates: 28g
• Fiber: 0.4g
• Protein: 2g
• Cholesterol: 185mg