How much manwich is needed to feed 20 people?

To feed 20 people with Manwich, you typically need about 2-3 ounces of the filling per person. This means you would need approximately 40-60 ounces of Manwich in total, which is roughly 2.5 to 3.75 cans (assuming each can is about 15 ounces). It's always a good idea to prepare a little extra to accommodate larger appetites.