I'm trying to collect the ingredients to go into the big soup pot, but have one on the 3rd floor that I can't get to yet, one on the 4th floor I can't get to yet, and one in the kitchen behind the wall of ice. I thought if I can get past the ice that hurts you, I can get the other 2 ingredients. So how do I get past the ice wall in the kitchen?

I don't want to give any spoilers but you'll need the Inferno technique to melt the ice. Look for it...

press down down up up circle right left L3 to get all of the ingredents.