Home-made white sauce ingredients:
Milk/cream, flour, butter, salt and pepper
Colman's packet white sauce ingredients:
Wheat Flour, Potato Starch, Palm Fat, Salt, Skimmed Milk Powder, Sugar, Glucose Syrup, Yeast Extract, Milk Proteins, Flavourings (contain Wheat, Barley), Maltodextrin, Lemon Juice Powder, Onion Powder, Nutmeg
Make your own and perfect your technique!