Baked Goods
How long does baking powder last in the pantry?
Baking powder runs 6–18 months from purchase and 3–6 months once opened — drop a spoonful into hot water before you trust it with a cake batter.
Pantry, from purchase
How long does it keep?
| Pantry, from purchase | 6–18 months |
|---|---|
| Pantry, opened | 3–6 months |
Can it sit out?
Baking powder is shelf-stable, so sitting out at room temperature isn’t the safety question — storage time is.
How to tell if baking powder has gone bad
- No fizz at all when a spoonful hits hot water
- A hard cake of powder you have to break with a knife
- Damp lumps rolling around in the tin
- Rust spots on the lid or the seam of the can
When in doubt, throw it out.
Never dip a wet spoon in the tin — the moisture sets the powder off right there in the can and takes the rest with it.
Quick answers
How long does baking powder last in the pantry?
Baking powder runs 6–18 months from purchase and 3–6 months once opened — drop a spoonful into hot water before you trust it with a cake batter.
How long can baking powder sit out?
Sitting out at room temperature isn’t the safety question for baking powder — storage time is.