To Blanch or Not to Blanch, That Is The Question

Jul 12, 2025Brenda Brink

Proper preparation is key when it comes to freeze drying food. Preparing your produce correctly ensures it retains the most nutrients and rehydrates well when you're ready to use it in a meal.

So how do you know whether or not you need to blanch your produce before freeze drying?  

We recommend following the same guidelines used for freezing fresh produce. The chart below offers some guidance.

Vegetable Blanch No Blanch Needed Blanch Time Additional Information
Asparagus 2–4 Minutes Can also grill this. Use minimal Oil
Beans  Not needed if canned 1–2 Minutes Blanch or use canned beans. Trim ends of fresh beans
Bell Peppers Slice and freeze dry
Beets ✓-Fully cook recommended Not needed if canned 25-30 Minutes to fully cook Cut into smaller pieces or slices if fresh. Canned works as well
Broccoli 3-4 Minutes  Cut into smaller pieces and blanch
Brussel Sprouts 3-4 Minutes Best blanched but can grate or slice without blanching
Cabbage Best Slice, diced, or grated.
Carrots 4 Minutes Slice or dice and then blanch 
Cauliflower 1 Minute Quick blanch Or No blanch, Either works. Cut into small pieces
Corn-Kernels only 2 Minutes Cut off the cob before blanching
Eggplant 3 Minutes Slice or dice before blanching
Mushrooms Sliced or smaller pieces work best
Okra 3 Minutes Sliced is best
Potatoes 2-3 Minutes Best cubed or sliced then blanch
Squash 3-4 minutes Best cubed then blanch
Tomatoes 1-2 Minutes Great to make sauces. Powder for easy use. Remove skins

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