Mustard (dried, ground) keeps about 6 months in the pantry. Frozen, it keeps about 1–2 years.
| Situation | Keeps for |
|---|---|
| Unopened · pantry | 6 months |
| Freezer | 1–2 years |
About 6 months, according to USDA FoodKeeper v128, stored as follows: cool, dry pantry away from heat and light.
Mustard (dried, ground) is shelf-stable at room temperature: cool, dry pantry away from heat and light. Refrigerating it mainly preserves quality rather than safety.
Look for: A rancid, paint-like, or musty smell; Bulging, leaking, deeply dented, or rusted cans; Insects or webbing in dry goods; Mould or discoloration. Never taste something to test it — when in doubt, throw it out.
Yes — USDA FoodKeeper v128 gives about 1–2 years in the freezer at 0°F (−18°C). Frozen food stays safe indefinitely; that window is about quality, not safety.