Blanching stops enzyme actions which otherwise cause loss of flavor, color and texture. In addition, blanching removes some surface dirt and microorganisms, brightens color and helps slow vitamin losses. ... Over-blanching leads to partial cooking and causes loss of flavor, color, vitamins and minerals.

Is it necessary to blanch vegetables before canning?

Blanching stops enzyme actions which otherwise cause a loss of flavor, color, and texture. In addition, blanching removes some surface dirt and microorganisms, brightens color, and helps slow vitamin losses. It also wilts greens, softens some vegetables, such as broccoli and asparagus, and makes them easier to pack.

Why do we blanch fruit?

Most vegetables should be blanched (briefly cooked in boiling water) before freezing. Fruit does not need to be blanched. To blanch: Bring 1 gallon of water per pound of prepped vegetables (about 2 cups) to a boil in a large pot. ... See suggested blanching time for vegetables below.