Bring steaks to room temp: Pat the venison dry with paper towels.
Let sit at room temperature for 20–30 minutes. This helps it cook evenly.
Preheat the air fryer: Set to 400°F (205°C) for at least 5 minutes. A hot basket helps build a crust.
Season generously: In a small bowl, mix salt, pepper, garlic powder, onion powder, smoked paprika, and herbs.
Rub steaks with oil, then coat evenly with the seasoning blend, pressing it in.
Prep the basket: Lightly spray or brush the air fryer basket with oil to prevent sticking.
Air fry: Place steaks in the basket with space around them. Cook 4–6 minutes, flip, then cook another 3–5 minutes. Aim for an internal temp of 125–130°F for medium-rare or 135°F for medium.
Venison is lean, so avoid going beyond medium.
Rest and baste: Transfer steaks to a plate. Top with the softened butter and a few drops of lemon juice or vinegar. Tent loosely with foil and rest 5–8 minutes.
The temperature will rise a few degrees as it rests.
Slice and serve: Slice against the grain. Taste and finish with a pinch of salt if needed.