Safe internal cooking temperatures are non-negotiable food safety knowledge. Every enhanced recipe that involves protein MUST reference safe temperatures. The science: pathogenic bacteria (Salmonella, E. coli, Campylobacter, Listeria) are killed at specific temperature-time combinations. The commonly cited temperatures are instant-kill thresholds, but lower temperatures held for longer periods achieve the same safety — this is the principle behind sous vide and pasteurisation tables. A calibrated instant-read thermometer is the single most important food safety tool in any kitchen.
Minimum safe internal temperatures (instant-read, thickest part): Poultry (all cuts, whole birds, ground): 74°C / 165°F. Ground meat (beef, pork, lamb): 71°C / 160°F. Whole cuts beef, pork, lamb (steaks, roasts): 63°C / 145°F with 3-minute rest. Fish and shellfish: 63°C / 145°F or until flesh is opaque and flakes. Eggs: cook until yolk and white are firm, or 71°C / 160°F for dishes containing eggs. Reheated leftovers: 74°C / 165°F throughout. These are Health Canada / USDA standards. The temperature-time equivalence: beef held at 54.4°C for 112 minutes achieves the same pathogen reduction as 63°C instantly — this is the science behind safe medium-rare sous vide cooking.
Invest in a quality instant-read thermometer (Thermapen or equivalent) — it's the single highest-return purchase for any cook. For whole poultry: measure in the thickest part of the thigh, not touching bone. For steaks: insert the probe from the side horizontally into the centre. Pull meat 3-5°C below target for steaks, 5-8°C below for large roasts, and let carryover do the rest. The sous vide pasteurisation tables (published by Baldwin, available free online) are the definitive resource for time-temperature combinations that achieve food safety at lower temperatures.
Not owning a thermometer — guessing doneness by colour, timing, or touch is unreliable. Measuring temperature in the wrong spot — always the thickest part, away from bone. Not accounting for carryover cooking — meat continues rising 3-8°C after leaving heat. Assuming all pink meat is unsafe — pork at 63°C with a 3-minute rest is safe even with slight pinkness. Assuming all brown meat is safe — colour is not a reliable indicator of temperature. Cutting into meat to check — this releases juices and gives inaccurate readings.