Ingredients

2 large egg yolks

1 tablespoon warm water

1 tablespoon fresh lemon juice

3/4 teaspoon coarse salt

1/2 cup (1 stick) unsalted butter

Preparation

In a processor, combine egg yolks, water, lemon juice, and salt; blend until frothy.

Melt butter in the microwave. With processor running, pour in hot butter in a very thin stream, blending until sauce is thick and emulsified.