Alfredo Sauce Make White Sauce from White Sauce Mix. To every 1/2 cup White Sauce add 2 to 4 cloves garlic, pressed, 1/2 cup grated Parmesan or Romano cheese and 1 cup light cream. To cooked and drained hot pasta, add Alfredo Sauce ingredients, one by one, mixing and tossing well after each addition. Serve immediately.