What process turns liquid cake into poofy air-filled solid cake?

什么过程使液体蛋糕变为蓬松充满空气的固体蛋糕？

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The Houston Ship Channel is clogged with beef fat. Unlike petroleum, which has a colorful sheen on the water's surface, beef fat turns into a solid cake, looking like a waxy ice flow.

休斯敦航道被牛肉脂肪堵塞了，不像在水面带有多彩光泽的石油，牛肉脂肪变成一块实心饼，看起来像条蜡状冰流。

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Interception of solid content called filter cake or cake.

被截留的固体物称为滤饼或滤渣。

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The principal danger for people living near Jaduguda, say environmentalists, is a 40-hectare "tailing" pond used to hold liquid and solid waste produced in the processing of the ore into yellow cake.

CNN: NUCLEAR FALLOUT

Beat each ice cream occasionally until frozen (Strong alcohol usage will prevent the ice cream from freezing solid.) This presentation is served with sugar-glazed sponge cake with almond flakes.

NPR: Hail to the Chef

The advice is they should be eaten by a day or two after the "best-before" date, providing the eggs are cooked thoroughly until yolk and white are both solid, or if they are used in dishes where they will be fully cooked, such as a cake.

BBC: Should you smell food before throwing it away?