Sous vide and cooking temperatures: time matters as much as heat
Sous vide cooks food sealed in a bag in a precisely controlled water bath. Because the food never exceeds the bath temperature, doneness is even edge to edge.
Time + temperature = safety
Pathogen kill depends on both temperature and time. USDA safe minimums (165°F poultry, etc.) are designed for near-instant lethality. Sous vide guides use lower temperatures held much longer, based on lethality tables. Those must be followed exactly, from a tested source, including thickness and holding time. Don't let a bot improvise them.
USDA safe minimums for everyday cooking
| Food | Safe minimum internal temperature |
|---|---|
| Poultry (whole, parts, ground chicken/turkey, stuffing) | 165°F (74°C) |
| Ground beef, pork, veal, lamb | 160°F (71°C) |
| Beef, pork, veal, lamb steaks, roasts, chops | 145°F (63°C) + 3-minute rest |
| Fresh or raw ham | 145°F (63°C) + 3-minute rest |
| Precooked ham (reheating, USDA-inspected plant packaging) | 140°F (60°C); other cooked ham 165°F (74°C) |
| Rabbit and venison | 160°F (71°C) |
| Fin fish | 145°F (63°C) or flesh opaque and flakes with a fork; shrimp, lobster, crab, scallops: pearly and opaque; clams, oysters, mussels: shells open |
| Egg dishes (casseroles, quiche) | 160°F (71°C); eggs: cook until yolk and white are firm |
| Leftovers and casseroles (reheating) | 165°F (74°C) |
From the FoodSafety.gov / USDA FSIS charts linked below. Keep food out of the 40°F-140°F "danger zone": refrigerate within 2 hours (1 hour if it is above 90°F outside). Fridge at 40°F (4°C) or below, freezer at 0°F (-18°C).
Rules
- Use bags rated for cooking.
- Chill fast in an ice bath if not serving right away; refrigerate.
- Don't hold food in the bath below 130°F (54°C) for long periods; that is too close to the danger zone.
- People at higher risk should stick to standard USDA temperatures.
Ask your bot about the science
Explain sous vide & temperatures in plain English for a home cook, with one kitchen experiment I can do to see it, and how it applies to [dish].
Give temperatures in °F and °C and say if they are approximate.Questions
Is chicken cooked sous vide below 165°F safe?
Only if held long enough at that temperature per validated time-temperature tables. If you are not following such a table exactly, cook to 165°F.
Where these facts come from
- American Chemical Society: Reactions, food chemistry explainers
- Exploratorium: Science of Cooking
- USDA FSIS: Safe temperature chart
- FoodSafety.gov: Safe minimum internal temperatures
- Harold McGee, On Food and Cooking (Scribner, 2004): the standard reference on kitchen chemistry
Checked Oct 29, 2026. Temperatures given for reactions are typical ranges, not sharp switches; they shift with moisture, pH and time. Food-safety numbers always come from USDA/FoodSafety.gov.
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