Lemon Curd: A Simple Checklist

Lemon curd scales up nicely for a party with a little planning. None of it needs special equipment. Let's look at what makes lemon curd work, and what you can skip.

Planning quantities

It helps to remember that other citrus fruits can be used the same way. Lime, orange, grapefruit and a combination of citrus juices all make lovely curds, though sweeter fruit may need slightly less sugar. Stored in a clean, covered jar in the refrigerator, homemade curd keeps for about a week and can be frozen for up to a few months.

It helps to make a small test batch before scaling a recipe up.

Making it in batches

Lemon curd is a smooth, tangy custard made from lemon juice, sugar, eggs and butter. It is thicker than a sauce and softer than a pudding, and it can be spread on scones, swirled into whipped cream, spooned into tart shells or layered into trifles. A small jar in the refrigerator opens up many easy desserts.

Freezer space

The method relies on gentle heat. Whisk eggs or yolks with sugar, lemon juice and zest in a heavy saucepan or in a bowl set over simmering water. Stir constantly over low heat as the mixture thickens. Using only yolks gives a richer, silkier curd, while whole eggs produce a lighter, slightly firmer one.

None of this needs to be exact; small changes in fruit or sugar are part of the fun.

Serving ideas

The curd is ready when it coats the back of a spoon thickly and a line drawn through it with a finger holds its shape. This usually takes eight to twelve minutes. Cooking it to about 170 degrees Fahrenheit thickens the eggs properly. Letting it boil, however, can cause the eggs to curdle and create a lumpy texture.

The practical takeaway is to taste the mixture before it goes in the freezer, since cold dulls sweetness.

Keeping it cold

Remove the pan from the heat and stir in cold butter a few pieces at a time. The butter adds richness and a glossy finish. Straining the curd through a fine sieve removes any bits of cooked egg and zest for a perfectly smooth result. Pressing plastic wrap directly onto the surface prevents a skin from forming as it cools.

Practical tips

Here are a few easy places to start:

• Taste the mixture before freezing; it will taste less sweet once frozen.
• Chill the base in the fridge before it goes in the freezer.
• Run molds under warm water for a few seconds to release them.
• Leave a little space at the top of molds for expansion.

The bottom line

Keep it simple, taste as you go, and have fun with the flavors. The best recipe is the one you will make again. Start with the basics and adapt from there.