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Lemon Curd

By America's Test Kitchen

Published on August 21, 2007

Time

20 minutes

Yield

Enough to top one cake layer (Makes about 1 cup)

Lemon Curd

Ingredients

⅓ cup lemon juice, from 2 lemons2 large eggs 1 egg yolk ½ cup sugar (3½ ounces/99 grams)2 tablespoons unsalted butter, cut into ½-inch cubes and chilled1 tablespoon heavy cream ¼ teaspoon vanilla extract pinch table salt

Instructions

  1. Heat lemon juice in small nonreactive saucepan over medium heat until hot but not boiling. Whisk eggs and yolk in medium nonreactive bowl; gradually whisk in sugar. Whisking constantly, slowly pour hot lemon juice into eggs, then return mixture to saucepan and cook over medium heat, stirring constantly with wooden spoon, until mixture registers 170 degrees on instant-read thermometer and is thick enough to cling to spoon, about 3 minutes (see photos, below).
  2. Immediately remove pan from heat and stir in cold butter until incorporated; stir in cream, vanilla, and salt, then pour curd through fine-mesh strainer into small nonreactive bowl. Cover surface of curd directly with plastic wrap; refrigerate until needed.
Lemon Curd
Photography by Kevin White.

Lemon Curd

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By America's Test Kitchen
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Time

20 minutes

Yield

Enough to top one cake layer (Makes about 1 cup)

Ingredients

⅓ cup lemon juice, from 2 lemons
2 large eggs
1 egg yolk
½ cup sugar (3½ ounces/99 grams)
2 tablespoons unsalted butter, cut into ½-inch cubes and chilled
1 tablespoon heavy cream
¼ teaspoon vanilla extract
pinch table salt

Test Kitchen Techniques

Ingredients

⅓ cup lemon juice, from 2 lemons
2 large eggs
1 egg yolk
½ cup sugar (3½ ounces/99 grams)
2 tablespoons unsalted butter, cut into ½-inch cubes and chilled
1 tablespoon heavy cream
¼ teaspoon vanilla extract
pinch table salt

Test Kitchen Techniques

Ingredients

⅓ cup lemon juice, from 2 lemons
2 large eggs
1 egg yolk
½ cup sugar (3½ ounces/99 grams)
2 tablespoons unsalted butter, cut into ½-inch cubes and chilled
1 tablespoon heavy cream
¼ teaspoon vanilla extract
pinch table salt

Test Kitchen Techniques

Why This Recipe Works

The most important step in our perfect lemon curd recipe is knowing when the curd is cooked. When the spatula leaves a clear trail (which quickly disappears) in the bottom of the saucepan, the curd is ready. If you leave it on the heat any longer, the spatula will leave a wide, clear trail as the curd becomes thick and pasty.

Instructions

  1. Heat lemon juice in small nonreactive saucepan over medium heat until hot but not boiling. Whisk eggs and yolk in medium nonreactive bowl; gradually whisk in sugar. Whisking constantly, slowly pour hot lemon juice into eggs, then return mixture to saucepan and cook over medium heat, stirring constantly with wooden spoon, until mixture registers 170 degrees on instant-read thermometer and is thick enough to cling to spoon, about 3 minutes (see photos, below).
  2. Immediately remove pan from heat and stir in cold butter until incorporated; stir in cream, vanilla, and salt, then pour curd through fine-mesh strainer into small nonreactive bowl. Cover surface of curd directly with plastic wrap; refrigerate until needed.

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