Making lemon powder is very easy

3. 

Dry the Peels:

Option A: 

Dehydrator

  • Spread the lemon peels in a single layer on dehydrator trays.
  • Dry at 95–115°F (35–46°C) for 6–10 hours, or until brittle.

Option B: 

Oven

  • Place peels on a baking sheet lined with parchment.
  • Dry at the lowest oven temp (around 150–170°F or 65–75°C) for 2–3 hours, flipping halfway through.
  • Leave the oven door slightly open for airflow.

Option C: 

Air Drying

(slower)

  • Lay peels out on a rack in a warm, dry area for several days, until completely dry.