Sugar
Hard chocolate, cake chocolate and cream filling........
The collective noun for Lifesavers (the candy) is a roll of Lifesavers. There is no collective noun for lifesavers (also called a life ring). However, a noun suitable for the situation can be used, for example a stack of lifesavers, a row of lifesavers, a locker of lifesavers, etc.
Sausage is the main ingredient.
Flour ( pasta ) is the main ingredient
The main ingredient in yoghurt is milk.
The shake's main ingredient is milk.
Beijing food does not have a main ingredient. Anything could be the main ingredient. It depend on the food.
Sugar is the main ingredient of candy
Cabbage is the main ingredient in sauerkraut.
Main ingredient is starch
The main ingredient in ham salad is ham.
The main ingredient in pasta sauce is tomatoes.