Lemon Curd: Step by Step

Here is lemon curd, broken into clear, simple steps. The method is forgiving, so small changes are fine. Here is a practical look at lemon curd for home kitchens.

Before you start

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 generally 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.

Step by step

On a day-to-day level, 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.

Ripe, in-season fruit does most of the work for you.

What to check

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.

If you remember one thing, let it be that the balance of sugar, fat and water decides the texture.

Freezing or baking

Put simply, 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.

Serving

Put simply, 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.

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

Practical tips

A few simple things tend to help:

• Run molds under warm water for a few seconds to release them.
• Chill the base in the fridge before it goes in the freezer.
• Store finished treats in an airtight container.
• Taste the mixture before freezing; it will taste less sweet once frozen.

The bottom line

Keep it simple, taste as you go, and have fun with the flavors. None of this needs to be perfect. A simple recipe made with good fruit will beat a complicated one.