Once opened, Pudding mixes keep about 3–4 months in the pantry. Unopened, they keep about 1 year.
| Situation | Keeps for |
|---|---|
| Unopened · pantry | 1 year |
| Opened · pantry | 3–4 months |
About 3–4 months in the pantry, according to USDA FoodKeeper v128.
Pudding mixes are shelf-stable at room temperature: cool, dry pantry, sealed — refrigerating after opening is optional and mainly preserves quality. 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.