Sauce hollandaise, also known as Hollandaise sauce, is a classic French sauce made by emulsifying melted butter and egg yolks with a touch of acid and seasoning. Hollandaise sauce is often served with eggs Benedict, a classic breakfast dish that consists of a toasted English muffin topped with ham, poached eggs, and Hollandaise sauce. It is also delicious with grilled fish, steamed vegetables, and roasted meats.