How Much Spaghetti Sauce to Feed 100 People?

Food manufacturer’s and the American Dietetic Association indicate that 1/2 cup is a serving for most foods, including spaghetti sauce. It will depend, though, on saucy and how large your portion sizes will be for your dish. On average 25 cups should be approximately the amount that you will need. But, it never hurts to have a little extra.