Reheating Leftovers? FSSAI Shares Mistakes That Can Make Food Unsafe

Why Reheating Leftovers Safely Matters

Cooking food properly is the first step to prevent illness from harmful bacteria. However, bacteria can return after cooking from the air, hands, or utensils. Even refrigerated food is not sterile and may contain some bacteria.

Reheating is your second chance to eliminate these bacteria. But it must be done correctly. Low temperatures allow bacteria to survive, while some containers can leach chemicals into food. Reheating the same food multiple times also increases the risk.

The Food Safety and Standards Authority of India (FSSAI) emphasizes that safe reheating is as crucial as proper cooking. Improperly reheated leftovers are a common cause of foodborne illnesses worldwide.

Let’s explore the four common mistakes FSSAI warns about and how to avoid them when reheating leftovers.

Mistake #1: Reheating at the Wrong Temperature

A common error is using default microwave settings, which often don’t reach a high enough temperature to kill bacteria. FSSAI recommends that reheated food must reach an internal temperature of at least 75 degrees Celsius (167 degrees Fahrenheit) throughout.

This temperature ensures most harmful bacteria are killed quickly. To check, use a food thermometer inserted into the thickest part. If you don’t have a thermometer, ensure the food is steaming hot throughout, bubbling, or simmering. For solid foods, the center should be hot to the touch.

Fix: Heat leftovers until they are steaming hot all the way through. Use high power settings on microwaves and stir. On the stovetop, heat on medium flame until bubbling. Adjust heating time based on food quantity and type.

Mistake #2: Using the Wrong Container

Reheating food in non-microwave-safe plastic containers can cause harmful chemicals like BPA to leach into your food. These chemicals are linked to various health issues.

FSSAI advises using only microwave-safe containers. It’s best to transfer food to glass or ceramic dishes, which distribute heat evenly and do not leach chemicals. Avoid using plastic wrap directly on food; use a microwave-safe lid or paper towel instead.

Never put metal or aluminum foil in a microwave, as it can cause sparks and fires. Always use microwave-safe dishes.

Fix: Transfer leftovers to glass, ceramic, or microwave-safe containers before reheating. For stovetop reheating, any pan is suitable. Use microwave-safe lids or paper towels for covering.

Mistake #3: Reheating Leftovers More Than Once

Reheating food multiple times significantly increases the risk of bacterial growth. Some bacteria produce heat-resistant toxins that remain even after reheating, causing illness.

The safest practice is to reheat only the portion you intend to eat for a single meal. Divide large batches of leftovers into single servings before storing them in the fridge or freezer.

Food reheated from a frozen state counts as one reheating. Do not reheat it again.

Fix: Never reheat leftovers more than once. Store leftovers in individual portions and reheat only what you will consume immediately. Discard any excess reheated food.

Mistake #4: Not Stirring Food Evenly

Microwaves can create cold spots in food, allowing bacteria to survive. FSSAI stresses the importance of even heating to ensure safety.

Stir liquid dishes halfway through microwaving. For solid foods like biryani, break up clumps and redistribute them. On the stovetop, stir regularly to ensure even heat distribution.

For flatbreads like roti or paratha, reheat them on a tawa (griddle) over medium heat, flipping them until hot. Avoid microwaving them unless wrapped in a damp paper towel to prevent drying.

Fix: Stir liquid foods at least once during reheating. Turn or flip solid foods to ensure even heating. Check for and eliminate cold spots.

How to Reheat Leftovers Safely (Step-by-Step)

Follow these steps for safe and effective reheating of leftovers, especially Indian dishes:

Step 1: Plan ahead. Remove leftovers from the fridge about 10 minutes before reheating. Do not leave them out for more than 30 minutes.

Step 2: Choose your method wisely.

• Curries, dal, soups: Stovetop or microwave. Stovetop offers more even heating.
• Rice, biryani: Microwave with a splash of water and cover. Stir halfway.
• Roti, paratha, naan: Tawa or oven. Avoid microwave unless wrapped in a damp paper towel.
• Fried foods: Oven or air fryer to maintain crispiness.

Step 3: Use the right container. Use glass or ceramic dishes for microwaving. Any pan is fine for stovetop. Never use non-microwave-safe plastic.

Step 4: Add moisture if needed. Add a tablespoon of water or broth to curries and rice to prevent drying and burning.

Step 5: Heat to the right temperature. Aim for at least 75 degrees Celsius throughout. Check the center if using a thermometer, or ensure thorough steaming/bubbling.

Step 6: Stir and check. Stir liquid dishes halfway through. Turn or flip solid foods. Ensure there are no cold spots.

Step 7: Serve immediately. Eat reheated food right away. Discard any excess; do not reheat it again.

Step 8: Proper storage. If you accidentally reheat too much, the extra must be thrown out. Do not refrigerate it.

When in Doubt, Throw It Out

If leftovers have been refrigerated for more than 3-4 days, it is best to discard them. Bacteria can grow even in the fridge if the temperature is above 5 degrees Celsius (41 degrees Fahrenheit). FSSAI recommends consuming cooked leftovers within two to three days.

Signs that leftovers are unsafe include:

• Sour, off, or unusual smell.
• Slimy texture or mold growth.
• Left at room temperature for over two hours.
• Stored in a warm environment.
• Already reheated once.

Do not taste food to check for spoilage. If it looks or smells wrong, throw it away. A small amount of food waste is better than food poisoning.

For leftover roti or paratha, ensure they are stored in a closed container in the fridge and reheated properly, rather than left out uncovered.

Quick Checklist for Safe Leftovers

• Store leftovers in the fridge within two hours of cooking.
• Use shallow containers for quick cooling.
• Eat leftovers within 3-4 days.
• Reheat only the portion you will eat.
• Use glass or ceramic dishes for the microwave.
• Never use plastic wrap or metal in the microwave.
• Heat food to at least 75 degrees Celsius (167 degrees Fahrenheit).
• Stir liquid dishes halfway through reheating.
• Flip or turn solid foods for even heating.
• Serve and eat immediately after reheating.
• Never reheat leftovers more than once.
• When in doubt, throw it out.

Making mistakes with leftovers is common. The key is to learn and apply safe reheating practices to enjoy your meals without worry.