the.com/souffle

means A light, airy baked dish—sweet or savory—made by folding beaten egg whites into a base so it puffs up dramatically in the oven.

from Straight from French souffler, 'to blow' or 'to puff,' itself from Latin sufflare (sub-, 'under,' + flare, 'to blow')—the same flare that breath gives a flame. The dish is literally a 'puffed-up' thing, named for the air blown into it by whipped whites and trapped by heat; the name is also a quiet warning, since whatever is blown up can just as easily be deflated.