1. Place butter in a medium glass bowl, and melt in the microwave, about 30 seconds on High. Whisk in the onion, white wine vinegar, egg yolks, heavy cream and lemon juice. Season with tarragon, parsley, salt, mustard powder and cayenne pepper; mix well. 2. Return to the microwave, and cook for 1 1/2 minutes, or until thickened, stirring until smooth every 20 to 30 seconds. ---------------------------------------------------------------------------
Nutrition
Ingredients
