FA-97049 / Recipe scaling and nutrition / Member archive
Baking pan substitution: bake time damping · case 04
Batter 50% deeper bakes 50% longer instead of 25% longer.
Case contract
Pans: ["round", diameter], ["square", side], ["rect", w, l] in inches; other -> "error: pan". If scale_to_fill, return factor round(area_new/area_old, 2), same minutes, warning None. Otherwise the same batter goes into the new pan: depth ratio = area_old/area_new, minutes = bake_min*(1+(ratio-1)/2) rounded half-up to a multiple of 5, factor 1.0, warning "overflow risk" when ratio > 1.5 else None.
Why this case matters
Bakers swap pan shapes and must scale the batter or adjust bake time for batter depth.
One recorded failure
Sample boundary fixtureThis sample comes from the broken implementation of a controlled reproducer.
| Boundary fixture | Actual | Expected | Outcome |
|---|---|---|---|
| ratio exactly 1.5 | {"factor": 1.0, "minutes": 45, "warning": null} | {"factor": 1.0, "minutes": 40, "warning": null} | Failed |
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