Best Method recommended method with best effort-to-efficacy tradeoff 1-3 months
Refrigerated After Opening
- Refrigerate after opening creamy, dairy, and egg-based dressings (ranch, Caesar) must be chilled; vinaigrettes keep best cold too
- Keep the cap tightly sealed between uses
- Store on a shelf, not the fridge door door temperature fluctuates as it opens and closes
- Use creamy dressings within about 2 months, vinaigrettes within about 3 months acidic vinaigrettes outlast lower-acid creamy dressings
Alternative another good method that's just different 6-12 months
Unopened Pantry Storage
- Keep unopened shelf-stable bottles in a cool, dark pantry
- Store away from heat and direct sunlight
- Follow the best-by date on the bottle this is a quality date, not a safety deadline
- Refrigerate once opened bottles sold from the refrigerated case should stay chilled even before opening
Fun Facts
- The USDA advises using opened salad dressing within about 2 months, but acidity matters, so tangy vinaigrettes tend to outlast lower-acid creamy dressings like ranch.
- Refrigerated-case dressings are formulated differently from shelf-stable bottles and rely on cold storage to stay safe, which is why they are never displayed on a warm shelf.