Next, you'll use either an electric food dehydrator or oven to dehydrate the strawberries fully. Drying removes all moisture leaving intense flavor and color.
Using a Dehydrator
If using a food dehydrator, set your unit to approximately 135°F. The exact time needed can vary from 6-15 hours based on humidity, the ripeness of the berries, and your dehydrator model.
Check frequently once the berries look dry on top. They should be evenly shriveled, brittle, and snap when bent rather than bending (this can take 6+ hours). Rotate the trays and continue drying if needed.
Using an Oven
To use your oven, preheat to 200°F (or the closest low temperature setting). Arrange the strawberry slices in a single layer on top of oven racks or baking sheets lined with parchment paper.
Prop the oven door open slightly with a wooden spoon to allow moisture to escape. Like with a dehydrator, drying times can range widely from 6-18 hours. Check them frequently toward the end.
The berries are done when no moisture remains and they appear shriveled and snap when bent. If any moisture remains, they will mold quickly.