Food safety basics

What is a TCS food?

A TCS food, Time/Temperature Control for Safety, is a food that supports the rapid growth of bacteria and therefore must be kept out of the temperature danger zone (41°F-135°F / 5°C-57°C). These foods need careful time and temperature control to stay safe.

Older training called these "potentially hazardous foods," but the current term on the ServSafe exam and in the FDA Food Code is TCS food. What makes a food TCS is a combination of moisture and nutrients that bacteria love, plus a neutral-ish acidity, exactly the conditions in FAT TOM.

Common TCS foods

  • Milk and dairy products
  • Meat, poultry, fish and shellfish
  • Shell eggs
  • Cooked rice, beans, pasta and other cooked plant foods
  • Cut leafy greens and cut tomatoes
  • Cut melons (a classic exam answer)
  • Tofu and other soy protein
  • Sprouts and raw seed sprouts
  • Sliced or cut ready-to-eat produce and garlic-in-oil mixtures

What is NOT a TCS food

Dry and shelf-stable foods generally are not TCS: uncooked dry rice or pasta, crackers, flour, sugar, whole uncut produce, and unopened commercially processed items like ketchup. Once you cut, cook or add moisture, many of these become TCS, a cut melon is TCS even though a whole melon is not.

Why it matters for the exam

Nearly every temperature rule on the ServSafe Food Handler exam, cold holding at 41°F, hot holding at 135°F, the 4-hour rule, the 7-day rule, applies specifically to TCS foods. Being able to spot which foods are TCS is what makes those rules click. Practice it in our Temperature Danger Zone Quiz.