Good-Cooking - Bearnaise Sauce #1

Ingredients

• 1/4 cup tarragon wine vinegar
• 1/4 cup dry white wine
• 1 tablespoon minced scallion
• 1 1/2 teaspoons dried tarragon
• 1/8 teaspoon pepper
• 1/8 teaspoon salt
• 3 egg yolks
• 3 tablespoons boiling water
• 1 cup butter, sliced into thin pieces