baking tray; baking sheet; sheet pan
A flat metal tray used for baking in an oven. The reading てんパン is specific to this cooking sense; the same kanji 天板 can also be read てんばん with other meanings (e.g., tabletop, soundboard).
See also: 天板 (てんばん)
I arranged the cookies on a baking sheet and put them in the oven.
Please line the baking tray with parchment paper.
Mixed kanji-katakana spelling that makes the reading explicit. Common in recipes and casual writing.
Compound of 天 (てん, 'top' or 'surface') and 板 (いた/ばん, 'board' or 'plate'), with the reading パン possibly influenced by the English word 'pan' or as a phonetic shift for clarity. The exact derivation of the パン reading is uncertain.