Homemade lemon curd is a different thing altogether from the jars in the shops: bright, sharp, glossy and tasting properly of lemon. It takes about quarter of an hour, and a batch will disappear onto toast, scones and puddings in no time.
The only skill is a gentle hand with the heat, so the eggs thicken the curd rather than scramble in it. The recipe is below, with more on why it sets the way it does underneath it.
How to Make Lemon Curd: A Simple UK Recipe
Makes About 3 × 200ml jars
Prep
15 min
Cook
12 min
Total
27 min
Makes
About 3 × 200ml jars
Ingredients
Fruit
Base
Eggs
Method
- 1
Sterilise 3 small jars and keep them warm.
- 2
Set a heatproof bowl over a pan of barely simmering water, with the base of the bowl clear of the water.
- 3
Add the zest, juice, sugar and butter, and stir until the butter has melted and the sugar has completely dissolved, so the mixture looks glossy.
- 4
Pour the beaten, strained eggs through a sieve into the warm (not hot) mixture, whisking as they go in.
- 5
Cook gently, stirring constantly and scraping the sides, for 10 to 12 minutes, until it thickens enough to coat the back of a spoon, about 77 to 80°C on a thermometer. Don't let it boil.
- 6
Push the curd through a fine sieve for a silky finish, then pot into the warm jars, cover and cool.
- 7
Seal, label, and keep in the fridge.
Cook’s notes
- Fridge-only, not a store-cupboard preserve: unlike jam, the sugar level is too low and it's rich in egg and butter, so keep it chilled and use within 2 to 3 weeks.
- It freezes well for up to a year; thaw overnight in the fridge and stir.
- Sieving is worth it. Even a perfect batch is smoother strained, and it's your safety net if a little egg catches.
- Other citrus works the same way: lime, orange, or a passionfruit and lemon mix, keeping the total juice around 150ml.
- A thermometer beats guesswork. Pull it at 77 to 80°C, and stop while it still pours, because it always thickens more as it cools.
- Use unwaxed fruit. You're eating the zest, so avoid waxed or heavily sprayed lemons.
What you’ll need
- Heatproof bowl and a pan, for a double boiler
- Balloon whisk
- Fine sieve
- 3 warm sterilised jars
Troubleshooting
There are specks of scrambled egg in it.
The heat got too high. Take it off the heat at once, whisk hard, then push it through a sieve; most split curds come back smooth.
It's too thin and won't set.
It's undercooked. Back onto a gentle heat and keep going to about 77°C, and trust that it firms up once cold.
It's gone grainy.
The sugar wasn't fully dissolved before the eggs went in. Next time hold it on a gentle heat, stirring, until it's smooth and glossy first.
I'm nervous it won't set.
Slake a teaspoon of cornflour into the beaten eggs before adding them, for a reliable, slightly firmer set.
It threatened to boil.
Lift the bowl or pan off the heat immediately. Boiling is exactly what curdles it.
More about lemon curd
Why it isn't a long-keeper like jam. Jam sets and preserves through a very high sugar concentration that starves microbes of water. Curd has far less sugar and is rich in fresh egg and butter, so it behaves like a fresh dairy custard: delicious, but it belongs in the fridge and is eaten within weeks, not stored in the cupboard for months.
The eggs do the thickening. As the yolk and white proteins warm, they gently set and trap the liquid, turning thin lemon juice into a spoonable cream. That same protein is why gentle heat matters: overheat it and the proteins clump into scrambled specks instead of a smooth set.
Why gentle heat, every time. Curd sets in a narrow window of roughly 77 to 82°C. Below it, it stays runny; above it, the egg curdles. A double boiler or the lowest hob setting keeps you inside that window, and constant stirring stops hot spots at the base from cooking the egg before the rest catches up.
What the butter does. Butter adds richness and, as it cools and re-solidifies, helps the curd firm to a glossy set, which is part of why curd thickens so much in the jar.
The zest carries the flavour. The aromatic oils are in the peel, not the juice, which is why unwaxed lemons and generous zesting make a brighter curd, and why sieving afterwards gives you smoothness without losing that flavour.
Frequently asked questions
Written by
UK Homesteading Team
Editorial team
The UK Homesteading editorial team, offering UK-specific, evidence-led guidance on growing, keeping, preserving and the law.
