How do you want to display ingredients on website? (Theme > Kitchen) has four options:

• Do not show sub-recipes or ingredients: no ingredient list.
• Show Sub-Recipes Only: lists the top-level recipe components (e.g. Teriyaki Sauce).
• Show Sub-recipes and its ingredient breakdown (default): lists each sub-recipe followed by its ingredients in brackets (e.g. Teriyaki Sauce (soy sauce, honey, garlic)).
• Show ingredients only: flattens everything into the raw ingredients.

Ingredients individually marked hide from customers are never listed, regardless of this setting.