1-First Step: Gather and prep your ingredients Before you begin, separate the egg yolks and measure everything out. This recipe moves fairly quickly once the pan goes on the stove, so it helps to have the sugar, lemon zest, lemon juice, salt, and butter ready. Cut the butter into pieces so it melts evenly. Set out a whisk, a medium saucepan, and a heatproof bowl for the finished curd.

2-Second Step: Whisk the base mixture In a medium saucepan, whisk together the 4 large egg yolks, 2/3 cup granulated sugar, 1 tablespoon lemon zest, 1/3 cup fresh lemon juice, and 1/8 teaspoon salt. Whisk until the mixture looks smooth and well blended. At this stage, the sugar should start dissolving into the lemon juice. This step is important because it helps the curd cook evenly later.

3-Third Step: Cook gently over medium-low heat Place the saucepan over medium-low heat. Stir constantly with a whisk or silicone spatula, making sure to reach the corners of the pan. Keep the heat gentle so the egg yolks do not scramble. After a few minutes, the mixture will begin to thicken. This is where patience pays off. The curd should reach a consistency that lightly coats the back of a spoon. If you have a kitchen thermometer, aim for about 170°F. Do not let it boil. A boil can make the curd grainy or curdled, which is the opposite of that smooth, creamy texture you want.

4-Fourth Step: Add the butter Once the mixture thickens, remove the pan from the heat. Add the 6 tablespoons unsalted butter, softened and cut into 6 pieces, one piece at a time. Whisk each piece in before adding the next. This helps the butter melt evenly and gives the lemon curd its glossy finish. The texture should become velvety and rich.

5-Fifth Step: Strain for extra smoothness For the silkiest result, strain the warm curd through a fine-mesh sieve into a clean bowl. This removes any tiny bits of cooked egg or zest that might remain. While this step is optional, it is especially helpful if you want a polished, bakery-style finish. If you are making the curd for guests, this extra step makes a big difference.

6-Sixth Step: Cool and chill Press a piece of plastic wrap directly onto the surface of the curd to keep a skin from forming. Let it cool at room temperature for a short time, then refrigerate it for at least 2 hours until fully chilled. As it cools, the curd will thicken more and take on that spoonable texture everyone loves.

7-Final Step: Serve and enjoy Once chilled, give the lemon curd a quick stir and use it right away or store it in a jar. Spoon it over pancakes, waffles, scones, yogurt, or cake layers. It also works well as a filling for tart shells and cookies. For a weekend breakfast spread, it tastes especially good with almond croissant bites.