Food Preservation as a section of Cooking. Food preparation methods and processes. Ingredients identify food materials; Global Cuisine owns regional traditions; Nutrition owns dietary effects.
Test your knowledge with these top questions!
What should a home canner do after the heat is turned off on a pressure canner full of green beans?
After natural cooling fully removes pressure, USDA directions say to open the vent and wait 10 minutes before removing the lid.
How should filled jars sit inside a pressure canner?
Tilting a filled jar can spill food into the lid's sealing area, so canners keep jars upright when loading and unloading.
Which inventor patented the screw-top Mason jar in 1858?
Early Mason jars used a zinc screw cap, unlike the separate flat lid and band familiar to later home canners.
Home pickling guides say to trim off which cucumber part to remove softening enzymes?
Old recipes used grape leaves to curb those enzymes; removing the blossom end makes the leaves unnecessary.
How long must steam flow continuously from a pressure canner before it is pressurized?
Trapped air lowers the temperature at a given pressure, so venting removes it before pressure processing begins.
Why do home canners use a new flat Mason jar lid for each batch?
The sealing compound dents to the jar rim during processing and may not form a safe vacuum seal a second time.
How often should a home canner have a dial-gauge pressure canner tested for accuracy?
A gauge that reads too high can hide low pressure and leave food underprocessed, even when the dial appears correct.
Why do refrigerator pickles often stay crisper than canned pickles?
Canned pickles can still stay firm: USDA offers a lower-temperature treatment for recipes that specifically allow it.
Why do refrigerator pickle recipes call for thin cucumber slices?
Thin cuts expose more surface to the salty-sour liquid, so the slices turn tangy in hours instead of days.
Homemade vinegar cucumber pickles that haven't been canned should be stored where?
Cold storage slows microbes; a tested recipe's vinegar is still needed because these pickles aren't processed for pantry storage.