paprika.

When stored properly in a cool, dark place, ground paprika maintains its best quality for about 6 to 12 months. It doesn't 'spoil' but loses its flavor and vibrant red color over time.

Chili powder is the closest substitute, though it often contains other spices. For heat, use a small amount of cayenne; for color, use annatto powder; for depth, use smoked paprika.

It is not recommended. Condensation from the freezing and thawing process can introduce moisture, leading to clumping and mold growth.

Check the color and scent. If the vibrant red has turned dull or brownish, or if the characteristic sweet/peppery aroma is gone, the spice is stale and should be replaced.

Sweet paprika is mild and made from bright red peppers; hot paprika includes the spicy pith and seeds; smoked paprika (pimentón) is made from peppers dried over oak fires.

Most standard 'sweet' paprika found in grocery stores is very mild. However, Hungarian varieties range from delicate and sweet to quite pungent and hot.

Keep it away from steam. Never shake the spice bottle directly over a steaming pot; instead, measure it into a spoon away from the heat.

Paprika becomes bitter if it is scorched or cooked at too high a temperature for too long. It is best added toward the middle or end of the cooking process.