2 sentences

1. 洗完头后，她的头发变得非常蓬松。

   xǐ​wán tóu hòu, tā de tóu​fa biàn de fēi​cháng péng​sōng.

   Her hair became very fluffy after washing it.

   Source: Dong Chinese Dictionary

2. 他在面团里加了一点苏打，让饼干更蓬松。

   tā zài miàn​tuán lǐ jiā le yī​diǎn sū​dá, ràng bǐng​gān gèng péng​sōng.

   He added a bit of baking soda to the dough to make the biscuits fluffier.

   Source: Dong Chinese Dictionary