Select good asparagus. Choose firm, bright green spears with tight tips. Medium-thick stalks dry more evenly than very thin or extra thick ones.

Wash and trim. Rinse well and snap off the woody ends. Pat dry thoroughly so excess water doesn’t slow down the drying process.

Decide on shape. Leave spears whole for a striking look, or cut into 1- to 2-inch pieces for easier snacking and faster drying. For “chips,” use a sharp knife or mandoline to slice on a bias, about 1/8 to 1/4 inch thick.

Optional blanch. For brighter color and slightly softer rehydration, blanch asparagus in boiling water for 1 to 2 minutes, then shock in ice water and dry well. Add a squeeze of lemon juice to the blanching water for color retention. Skipping this step yields a slightly earthier flavor and deeper green.

Season lightly. Toss asparagus with a small amount of olive oil—just enough to coat—and season with salt and pepper. Add any optional spices. Go easy on the salt; dehydration concentrates flavors.

Arrange on trays. Spread in a single layer on dehydrator trays or parchment-lined baking sheets. Leave space between pieces for airflow.

Dehydrate. Dehydrator: Set to 125°F to 135°F (52°C to 57°C). Dry for 6 to 10 hours for pieces, 8 to 14 hours for whole spears, depending on thickness and humidity.

Oven: Set to the lowest temperature (usually 170°F/75°C). Prop the door open slightly with a wooden spoon for airflow. Check frequently; drying time ranges from 3 to 6 hours for pieces, longer for whole spears.

Check for doneness. Spears should feel completely dry and snap cleanly. No tackiness or sponginess. If in doubt, dry a bit longer.

Condition the batch. Let cool, then place the dried asparagus in a loosely filled jar for 5 to 7 days, shaking daily. If you see condensation or clumps, return to the dehydrator to remove remaining moisture.

Store. Once conditioned, move to airtight containers, jars with tight lids, or vacuum bags. Label with the date.