Can Broccoli be frozen raw?
Matanuska-Susitna Borough Alaska
Broccoli is blanched for effective freezing. If frozen raw, broccoli is often bitter, drab green, and shriveled. Blanching is vegetable exposed to boiling water or steam for short time, then rapidly cooked in ice water to stop cooking. Blanching broccoli destroyed microorganisms on the surface of the vegetable. It makes broccoli more compact, and preserves the bright green color and tasty flavor. You may either blanch in boiling water for three minutes or steam for five minutes.
Beware, over-blanching results in a cooked product and a loss of flavor, color and nutrients. Under-blanching stimulates enzyme activity and is worse than no blanching at all. (So Easy to Preserve Sixth Edition, 2014, page 252)