Preheat the smoker to 225° using a hardwood like oak or hickory.
Mix the dry seasoning ingredients together in a small bowl until evenly combined, pat the meat dry using paper towels, then spread the seasoning evenly out over all sides of the meat, pressing in as necessary.
1 tbsp garlic powder, 2 tsp paprika, 1 tsp chili powder, 1/4 tsp cayenne pepper, 1 tbsp onion powder, 1 tsp each salt & freshly ground black pepper, 1 3 lb tri tip roast
Transfer the seasoned meat directly to the grates of the smoker and add a meat probe to the center of the thickest part of the tri tip.
Smoke until the temperature reads 5-10 degrees from the target temperature. For rare, it will smoke roughly 90 minutes and be 115°. For medium, it will smoke for roughly 2 hours and be 125-130°. For well done it will smoke for roughly 2 1/2 hours and be 145-150°.
Melt the butter in a cast iron skillet set over medium high heat until hot. Using tongs, sear the hot meat 2-3 minutes per side. This is an optional, but recommended step.
2 tbsp butter
Transfer the meat to a waiting cutting board. Let the meat rest for 15 minutes.
Thinly slice against the grain, serve warm, and enjoy!