This easy homemade lemon curd recipe is silky smooth, creamy, and requires just 6 simple ingredients in order to make. The tart lemon flavor is obvious while also being sweet, making it perfect to fill cupcakes, spread over cake layers, or use in this lemon thumbprint cookie recipe.
In a small saucepan over medium-low heat, whisk together the egg yolks, sugar, lemon juice, lemon zest, and salt.
Whisk constantly as the lemon curd cooks to avoid any curdling. It will take about 10-15 minutes to thicken.
Once thick, remove from the heat and mix in the cubed butter until completely melted and combined.*The lemon curd will continue to thicken as it cools.
Scrape the curd into a heat-safe bowl, cover with plastic wrap, and place in the refrigerator to cool completely.