How to Make Jerky in a Dehydrator: Step-by-Step Guide

A batch of jerky that never hit a safe internal temperature looks perfect and can still make someone sick. Heat is the step home cooks skip, and it matters most. This covers trimming, slicing, marinating, heating to 160°F, drying, and testing for doneness — plus the equipment check that decides whether your dehydrator can do the job.

What You Need Before You Start

You need lean meat, a refrigerator, and a dehydrator with an adjustable thermostat that holds its set temperature. Matching equipment to the job matters more than any marinade recipe — our tested roundup of home dehydrators for jerky covers which models hold a steady low temperature.

• Lean meat: Beef round or another trimmed, low-fat cut. NCHFP says discard all fat because it turns rancid quickly.
• A food thermometer: Ohio State recommends a bi-metallic stemmed thermometer to test your dehydrator’s true temperature before use.
• Clean equipment and hands: Wash with soap and water before and after handling raw meat.
• Refrigerator space: Keep meat at 40°F or below, and defrost frozen meat in the refrigerator, never on the counter.

How to Slice, Marinate, and Heat the Meat

Trim every bit of fat, gristle, membrane, and connective tissue, slice no thicker than 1/4 inch, and marinate in the refrigerator 1 to 2 hours or overnight. coli O157:H7 if present.

Slicing thin shortens drying time and lets the lethality step reach the center of every strip, not just the surface. Strips about 1/4 inch to 1/2 inch thick and 5 to 6 inches long are common, but thicker cuts lengthen both the heat and drying steps.

Marinate cold, always — never at room temperature, and never reuse marinade that touched raw meat. Once soaked, heat meat to 160°F — in the dehydrator, oven, or a hot pan — before it goes on the trays. If you skip that step, NCHFP says you can still make the batch safe by heating finished strips in a 275°F oven for 10 minutes for 1/4-inch strips; thicker strips need longer to reach 160°F.

How Long Does Jerky Take in a Dehydrator?

There is no fixed number, which is why the doneness test matters more than the clock.

Set the dehydrator to roughly 130°F to 140°F during drying. Some guidance sets the floor higher: Ohio State says the unit should hold at least 145°F throughout drying, while NCHFP says to preheat to 140°F and dry until done. Sources differ on minimum drying temperature, but all keep the 160°F lethality step. Arrange strips close together but not touching, leaving about 25% open space per tray for airflow.

A strip is finished when it cracks but does not break as you bend it. Anything that snaps is over-dried; anything that flexes like fresh meat needs more time.

Mistakes That Ruin a Batch

Almost every failed batch traces to a handful of errors, each breaking a safety rule rather than a flavor rule. Fix these and the rest behaves.

• Skipping the pre-cook: No lethality step means no protection against E. coli O157:H7.
• Trusting the dial: Many dehydrators never reach 140°F, so verify the true temperature with a thermometer first.
• Slicing too thick: Thick strips dry unevenly and may stay under 160°F at the center.
• Overloading trays: No airflow means meat sits wet and warm — exactly what you don’t want.
• Marinating on the counter: Keep it refrigerated at 40°F or below the whole time.
• Reusing marinade: It has touched raw meat — pour it out.