Rinse the herbs under cool water to remove any dirt or bugs.
Gently pat them dry with paper towels or a clean kitchen towel to remove excess water.
Gently pull the herb's leaves from the stems. Herbs with small leaves like thyme or oregano, you can use your fingers or a pair of scissors to snip the leaves from the stems. For larger leaved herbs like sage or parsley, simply pluck the leaves off of the stems and then discard any damaged or discolored ones.
Spread the leaves out in a single layer on your parchment lined baking sheet, making sure they aren’t overlapping.
Preheat your oven to the lowest temperature setting, usually somewhere between 140-170°F (60-75°C). If your oven doesn’t go that low, prop the oven door open slightly so you can let a little heat escape.
Place the cookie sheet in the oven. Depending on the herb and your oven, drying can take somewhere between 1 to 3 hours.
Your herbs are ready when they crumble easily between your fingers.
Allow the herbs to cool completely before transferring them to airtight containers.
Label your containers with the herb name and the date.
Store them in a cool, dark place to maintain their freshness.