1/2 cup unsalted butter
2 large egg yolks
2 tablespoons cold water
1 tablespoon fresh lemon juice
1/8 teaspoon salt
Place butter in a small saucepan over medium-low heat; cook 5 minutes or until completely melted. Carefully skim solids off the top with a spoon; discard solids. Slowly pour remaining butter out of pan, leaving remaining solids in pan; discard solids. Combine egg yolks and 2 tablespoons water in a small saucepan, stirring with a whisk until foamy. Place pan over medium heat, stirring constantly until mixture thickens slightly. Gradually add 1/4 cup clarified butter, about 1 tablespoon at a time, stirring with a whisk until each addition is incorporated and mixture is thick. Reserve remaining clarified butter for another use. Stir juice and salt into butter mixture, whisking until blended.
