slow-cooker ChartsDATASHEET // CT-SC-084
slow-cookerSTATE: FRESHVERIFIED DATASHEET
How Long to Cook French Onion Soup (Slow-Caramelized Onion Base) in the slow cooker
Specification: 5 lb thinly sliced yellow onions tossed with 4 tbsp butter and beef stock
Target Temp
LOW (6–8 hrs) or HIGH (3–4 hrs)
Low & Slow
Total Time
10–12 hrs
Total Cook Window
Flip Mark
No Flip
Continuous Cook
Internal Safe Temp
195°F (91°C)
USDA Safe Pull
COOK MODE
Live timer · flip prompt · target temp · rest stage
3-Step Execution Protocol
1
Preheat & Prep
Add french onion soup (slow-caramelized onion base) (5 lb thinly sliced yellow onions tossed with 4 tbsp butter and beef stock) to the slow cooker. Set to LOW (6–8 hrs) or HIGH (3–4 hrs).
2
Slow Cook
Cook for 10–12 hrs. Keep lid on; do not stir unless specified.
3
Check & Rest
Onions have reduced down dramatically into a deep mahogany-brown, sweet, jammy mass Confirm internal temperature reaches 195°F (91°C). Rest for 10 minutes before serving.
Verification Basis & Testing Rig
America's Test Kitchen Slow Cooker Revolution & Crock-Pot Soup Timetable
Pro Tip: Slow cook sliced onions on Low for 10 hours with the lid cracked slightly during the last 2 hours; this produces rich caramelized onions without standing over a stove.
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