Infuse the Sugar: Rub the lemon zest into the sugar with your fingers. This enhances the citrus flavor.Whisk the Base: Whisk together the lemon-sugar mixture, eggs, lemon juice, and salt until smooth.Cook Gently: Pour into a saucepan and cook over medium-low heat, whisking constantly.Cook until the mixture slightly thickens and coats the back of a spoon, about 6–8 minutes. It should remain pourable.Do not let it boil.
Add Butter: Remove from heat and whisk in butter until smooth and glossy.Strain (Optional): For a silky finish, strain through a fine mesh sieve.Let cool slightly before serving. The sauce will thicken a bit as it cools but will remain spoonable.
Notes
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Calories are estimated per serving.
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