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How to Make Lemon Curd

Homemade lemon curd in a small jar with a spoon in it.

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Managing the perfect balance between sweet and tart, this homemade Lemon Curd is a bright citrus spread that is perfect to use in a variety of desserts. It's simple and quick to make on the stove, requiring just a handful of ingredients and about 10 minutes of your time.

Ingredients

  • 1 tablespoon very finely grated lemon zest
  • 6 large egg yolks
  • 3/4 cup (150 grams) granulated sugar (see notes)
  • ½ cup (112 grams) fresh-squeezed lemon juice (from about 3-4 large lemons)
  • Pinch coarse kosher salt
  • 8 tablespoons (113 grams) cold unsalted butter, diced into pieces

Instructions

  1. Bring a small saucepan of water to a simmer over medium heat on the stove, which will act as a double-boiler. 
  2. Add the egg yolks and sugar to a medium heat-proof bowl. Vigorously whisk the yolks into the sugar until the mixture is lightened in color and increased in volume, about TK time. Whisk in the lemon zest, lemon juice, and salt.
  3. Set the bowl over the simmering saucepan (but don’t let it touch the water). 
  4. While stirring constantly with a rubber spatula, cook the mixture for 8-10 minutes, until the mixture has just thickened and reached a temperature between 170ºF-180ºF. To double-check that the curd has thickened properly, take a wooden spoon and coat it with the curd. Draw a horizontal line on the back of the spoon with your finger. If the line “holds” then your curd is set. If the line collapses right away, the curd needs to cook for another minute or so. However, do not bring the mixture to a boil, this will overcook it.
  5. Take the curd off the heat. If desired, to make it completely smooth, pour the hot curd through a fine-mesh strainer into another bowl. This is entirely optional.
  6. Whisk the cold butter into the curd, a few pieces at a time, until it is fully emulsified.
  7. Transfer the curd to a jar and let cool completely before covering and refrigerating.

Notes

To make a slightly less sweet, more equally tart curd, reduce the amount of sugar to ½ cup. 

Make sure to only use stainless steel or lined metal pots or utensils. If you don't know if your whisk is stainless steel, make sure to only use it briefly when whisking together the ingredients. Use a rubber spatula when stirring the pot to prevent any prolonged contact with unlined metal.