Proper cooking destroys many harmful microorganisms, but cooking should not be used as a way to “save” meat that is clearly spoiled or has been improperly stored.

If meat has an obvious foul odor, slimy texture, or other strong signs of spoilage, don’t assume that cooking it at a high temperature will make everything safe.

It’s better to discard questionable meat than risk foodborne illness.

How to Cook Ground Beef Safely

If the meat appears normal apart from the gray center, cook it properly.

1. Wash your hands

Wash your hands before and after handling raw ground beef.

2. Keep raw meat separate

Don’t allow raw beef to contact foods that will be eaten without further cooking.

3. Break the meat apart

Use a clean spatula to separate the block into smaller pieces.

4. Cook thoroughly

Continue cooking until the meat reaches 160°F (71°C).

5. Use a thermometer

Place the thermometer into the thickest part of the meat.

Don’t rely solely on its color.

6. Clean your equipment

Wash utensils, plates, cutting boards, and surfaces that came into contact with raw meat.

Don’t Wash Raw Ground Beef

There is no need to rinse raw ground beef before cooking.

Washing raw meat can cause contaminated droplets to splash onto your sink, countertops, utensils, or nearby foods.

Instead, cook the meat directly and clean the surrounding surfaces afterward.

Why the Meat May Turn Red Again

If you open the package and separate the gray center from the rest of the meat, you may notice the color gradually becoming redder.

This is normal.

The previously protected meat is now exposed to oxygen.

The pigments respond to the oxygen, changing the appearance.

This can be surprising, but it doesn’t mean the meat has suddenly become fresher.

It’s simply a chemical reaction involving myoglobin.

What About Dark Purple Beef?

Not all fresh beef is bright red.

Beef that has had little exposure to oxygen can have a darker purplish-red appearance.

After exposure to air, it can become bright red.

This is another normal consequence of oxygen interacting with meat pigments. (Ask USDA)

Therefore, fresh beef can naturally have several different shades depending on packaging and oxygen exposure.

The Most Important Rule

When dealing with raw ground beef, remember:

Color is not a reliable safety test.

A beautiful red color doesn’t guarantee that the meat is safe.

A gray center doesn’t automatically mean the meat is spoiled.

And brown cooked meat doesn’t necessarily mean it has reached a safe temperature.

The most reliable way to determine whether ground beef has been adequately cooked is to use a food thermometer and reach 160°F (71°C) throughout.

Final Takeaway

If you open a package of ground beef and discover that it is red on the outside but gray inside, don’t panic.

The most likely explanation for a tightly packed block is that the exterior has been exposed to oxygen while the interior has not.

However, always consider the entire condition of the meat.

If it has been properly refrigerated, is within the recommended storage period, has a normal texture and smell, and only the center is gray, the color difference alone does not prove spoilage.

If the entire package has turned gray or brown, or the meat has a strong unpleasant odor, slimy texture, or questionable storage history, it is safer not to eat it.

And when cooking ground beef, don’t rely on appearance.

Cook it to 160°F (71°C) and check with a food thermometer.

The gray center in the image may look unpleasant, but gray does not automatically mean rotten—and red does not automatically mean safe.

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