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How long do snack bars and toaster pastries last?

Snack bars and toaster pastries keep 6–12 months in the pantry, according to USDA FoodKeeper.

Quick answer

Fridge—No FoodKeeper guidance
Freezer—No FoodKeeper guidance
Pantry6–12 months 

Storage times by type

TypeFridgeFreezerPantry
Cereal or granola bars——
  • Unopened: 6–12 months
Popcorn (microwave packets)——
  • Unopened: 6–12 months from purchase
  • Opened: 1–2 days after opening
USDA tips: Pantry: After opening time applies to prepared product.
Toaster pastries——
  • Unopened: 6–12 months from purchase
  • Opened: 1–2 weeks after opening

Also covers: granola bar, cereal bar, protein bar, snack bar, microwave popcorn, pop tarts, toaster pastries.

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These are general guidelines from the USDA’s FoodKeeper data for food stored at safe temperatures: fridge at 40°F (4°C) or below, freezer at 0°F (−18°C). Freezer times are for best quality; food kept constantly frozen at 0°F stays safe longer. Always check the package and the food itself. When in doubt, throw it out. Shelf Shepherd isn’t affiliated with or endorsed by the USDA.

Source: USDA FSIS FoodKeeper data. Last reviewed November 5, 2026.

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