Muffin (mix, dry, commercially packaged) keeps about 9 months in the pantry.
| Situation | Keeps for |
|---|---|
| Unopened · pantry | 9 months |
About 9 months, according to USDA FoodKeeper v128, stored as follows: cool, dry pantry away from heat and light.
Muffin (mix, dry, commercially packaged) is shelf-stable at room temperature: cool, dry pantry away from heat and light. Refrigerating it mainly preserves quality rather than safety.
Look for: Visible mould — green, white, black, or pink; A musty or alcohol-like smell; Hard, dry, or stale texture; A slimy or sticky crust. Never taste something to test it — when in doubt, throw it out.