Potato chips do not give me gas.
Sour cream does not give me gas.
Lipton onion soup mix does not give me gas.
However, when I combine the sour cream and onion soup mix, then dip my chips therein, it usually gives me nasty, odorous gassiness.
How come?
Sometime I make burgers with the onion soup mix (usually store brand, not Lipton), and it gives me the foulest WMD-grade gas I ever get.
Perhaps the soup mix + something with fat (meat, or sour cream or chips) is the key.
I never make soup from the stuff, so I can’t say if it does anything to me in that form.