Beurre Noisette and Beurre Noir can be garnished with herbs other than the traditional chopped parsley. Tarragon, chervil, marjoram, and oregano all provide different nuances. Other components, such as chopped garlic, diced gherkins (cornichons), diced mushrooms (wild or otherwise), diced truffles, and chopped shallots can be added to the butter while it is being heated. Acidic liquids such as verjuice or reduced red or white wine can replace the traditional lemon juice and vinegar.