I think it works better for soup because soup is hotter to you than you are to ice cream.
And, moreover, when you blow on something, the air that hits the thing youre blowing on is much closer to the ambient air temperature than your internal body temperature.
I mean it works better for soup than for solid hot foods too. Still works for the latter, but takes a bit more to cool down the inside if it’s a thick piece.
I think it works better for soup because soup is hotter to you than you are to ice cream.
And, moreover, when you blow on something, the air that hits the thing youre blowing on is much closer to the ambient air temperature than your internal body temperature.
I mean it works better for soup than for solid hot foods too. Still works for the latter, but takes a bit more to cool down the inside if it’s a thick piece.