Trim and season tri tip with the salt, peper, and garlic powder. Optionally allow to rest 30 minutes after seasoning.
Preheat oven to 425 and heat skillet over medium-high heat with oil. Once hot, sear tri tip fat side down for 2 minutes. Add butter, flip, and transfer to preheated oven.
Roast for 20 minutes and check doneness with a meat thermometer. Once at your desired temperature remove and rest covered for 10 minutes.
Slice against the grain and serve.
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Notes
Oven cook time will vary based on thickness of your tri tip and desired doneness. For medium rare in the center remove from the oven at 130 degrees- ends will be more done than the center due to the triangular shape.Keep in mind when slicing that the grain shifts on this cut, so your slices will need to as well.
Nutrition information is provided as a courtesy and is an estimate. It is recommended to use your preferred calculator with the actual ingredients you use for optimal accuracy.