oven ChartsDATASHEET // CT-OV-127
ovenSTATE: FRESHVERIFIED DATASHEET
How Long to Cook French Onion Soup (Slow-Caramelized Onion Base) in the oven
Specification: 3 lb yellow onions thinly sliced, tossed with butter and salt in covered 5-quart Dutch oven
Target Temp
375°F (191°C)
Radiant Heat
Total Time
50–65 mins
Total Cook Window
Flip Mark
30m
Turnover Point
Internal Safe Temp
—
USDA Safe Pull
COOK MODE
Live timer · flip prompt · target temp · rest stage
3-Step Execution Protocol
1
Preheat & Prep
Preheat oven to 375°F (191°C). Prepare french onion soup (slow-caramelized onion base) (3 lb yellow onions thinly sliced, tossed with butter and salt in covered 5-quart Dutch oven).
2
Cook & Flip
Cook for 50–65 mins. Flip at the 30-minute mark for even browning.
3
Check & Rest
Onions have collapsed into a rich, mahogany-brown jam with intense sweet aroma and zero scorching Rest for 0 minutes before serving.
Verification Basis & Testing Rig
America's Test Kitchen Hands-Free Oven Caramelized Onions Method & Julia Child
Pro Tip: Bake covered for 40 minutes, then uncover and stir every 10 minutes to evenly evaporate water and caramelize sugars without burning.
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