Wash your apples.

Quarter and core the apples, but do not peel them.

Slice the apples into smaller pieces, unless you have a super powerful blender.

Add your apples to a blender or food processor in small batches. I use a Magic Bullet. Add just enough water to puree the raw apples. I have found that more water is needed with a food processor than with the Magic Bullet.

Spread the pureed apples very thinly on your dehydrator's fruit leather sheets. Dehydrate at 140°F. You want the puree to dry well beyond the fruit leather stage, until it is crispy. This may take up to 24 hours depending on how much water you had to use as you pureed the apples.

When the puree is crisp, remove it from the dehydrator and allow to cool.

Grind the dehydrated puree in a blender until it is powdered. Store in an airtight container.