barley
A cereal grain with a chewy texture and nutty flavor, used whole in soups, stews, and side dishes, or malted for brewing. Like other dry grains, it absorbs several times its volume in water as it cooks, so a small dry measure goes further than it looks like it will. It contains gluten, unlike rice or corn, which matters if a substitution needs to avoid wheat/barley/rye.
Buying guidance
Buy pearled or hulled depending on how much of the bran you want removed -- pearled cooks faster and has a milder flavor; hulled keeps more texture and nutrition but takes longer to cook. Choose a sealed package free of insect damage or a stale, musty smell.
Substitutions
- Farro or wheat berries -- a similarly chewy grain in soups and grain bowls; check package cooking times, since they can run longer than barley.
- Brown rice -- softer and less chewy, but a reasonable stand-in for bulk and texture.
- Pearl couscous -- much faster-cooking and softer; a good swap when time is the constraint rather than chew.
Tips & common mistakes
Barley keeps absorbing liquid even after it's taken off the heat, so a soup or side dish that looked properly brothy right at the end can turn thick and pasty by the time it's served if it sits covered for a while -- leftovers often need a splash of water or stock stirred in when reheating.
Storage
Hulled barley, with more of its bran layer intact, has more natural oil and turns rancid noticeably sooner than pearled barley, which has had most of that layer polished away -- if you buy hulled barley in bulk, the freezer keeps it fresh far longer than a pantry shelf will.