vigorously Baking Soda 8 months to a year Cornstarch Indefinitely DutchProcess Cocoa 1 to 2 years Flour, allpurpose Transferred to a sealed container up to a year Flour, bread Transferred to a sealed container up to a year Gelatin, powdered Indefinitely Sugar, brown In an airtight plastic bag, 3 to 4 months optimally—after that, it may harden; hard brown sugar can be restored by briefly microwaving Sugar, granulated Transferred to a sealed container, indefinitely Vanilla Extract 1 to 2 years Yeast, instant (rapidrise) If possible, purchase in bulk and transfer to a sealed container; individual packets are harder to use and far more expensive Keeps indefinitely in the freezer; if stored at room temperature or in the fridge, it will need to be proofed occasionally: add 2 tablespoons warm ... Yeast, instant (rapidrise) If possible, purchase in bulk and transfer to a sealed container; individual packets are harder to use and far more expensive Keeps indefinitely in the freezer; if stored at... harder to use and far more expensive Keeps indefinitely in the freezer; if stored at room temperature or in the fridge, it will need to be proofed occasionally: add 2 tablespoons warm