Cake, brownie, bread mixes keep about 12–18 months in the pantry.
| Situation | Keeps for |
|---|---|
| Unopened · pantry | 12–18 months |
About 12–18 months, according to USDA FoodKeeper v128, stored as follows: cool, dry pantry away from heat and light.
Cake, brownie, bread mixes are 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; Clumping, or moisture in something that should be dry; Insects, webbing, or larvae in the package; Faded colour or a lost aroma. Never taste something to test it — when in doubt, throw it out.