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How to Use a Dehydrator (Apples, Bananas, Herbs, Onions & Garlic)

Learn how to dehydrate apples, bananas, herbs, onions, and garlic at home using a dehydrator. This step-by-step guide helps you preserve food, reduce waste, and build a working pantry with shelf-stable ingredients.
Prep Time15 minutes
Active Time12 hours

Materials

  • Apples any variety
  • Bananas
  • Fresh herbs parsley, basil, oregano, thyme, etc.
  • Onions
  • Garlic
  • Optional for apples/bananas:
  • Lemon juice to prevent browning
  • Water

Instructions

  • General Dehydrator Setup
  • Wash all produce thoroughly and pat dry.
  • Slice evenly to ensure consistent drying.
  • Arrange in a single layer on dehydrator trays (do not overlap).
  • Set dehydrator temperature based on food type (see below).
  • Rotate trays if your dehydrator does not have a rear fan.
  • Dry until food is fully dehydrated (no moisture, leathery or brittle depending on item).

Apples (Slices or Chips)

  • Core apples and slice into ¼-inch rounds or wedges.
  • Optional: Soak in a mixture of 1 tablespoon lemon juice + 1 cup water for 5 minutes to prevent browning.
  • Place slices in a single layer on trays.
  • Dehydrate at 135°F for 6–10 hours.
  • Apples should be leathery and slightly flexible when done.

Bananas (Chips or Slices)

  • Peel bananas and slice into ¼-inch rounds.
  • Optional: Dip in lemon water to reduce browning.
  • Arrange on trays without overlapping.
  • Dehydrate at 135°F for 6–10 hours.
  • For chewy bananas, remove earlier. For crisp chips, dry longer until fully firm.

Fresh Herbs

  • Remove stems and rinse gently if needed. Pat completely dry.
  • Spread leaves loosely on trays.
  • Dehydrate at 95–105°F for 2–4 hours.
  • Herbs should crumble easily when fully dry.

Onions

  • Peel and slice onions into thin rings or small diced pieces.
  • Separate layers for even drying.
  • Spread evenly on trays.
  • Dehydrate at 125–135°F for 8–12 hours.
  • Onions should be completely dry and brittle.

Garlic

  • Peel cloves and slice thinly or mince.
  • Spread evenly on trays.
  • Dehydrate at 125–135°F for 6–10 hours.
  • Garlic should be crisp and fully dry.

Final Steps

  • Properly dried food should have no visible moisture and feel leathery or brittle depending on the item.
  • Let food cool completely before storing.
  • Condition fruit (like apples/bananas) by storing loosely in a jar for a few days and shaking daily—if moisture appears, return to dehydrator.
  • Store in airtight containers, mason jars, or vacuum-sealed bags.
  • Keep in a cool, dark place for best shelf life.