What is tri tip, exactly?
Tri tip is a triangular cut from the bottom sirloin (often labeled bottom sirloin butt). It is known for being beefy, affordable compared to ribeye, and perfect for roasting or grilling. You will usually see it sold as a 2 to 3 pound roast.
Do I need to marinate tri tip?
Nope. You can, but you do not have to. This dry rub plus a short rest before cooking gives you plenty of flavor. If you want extra insurance, salt it ahead (even 2 hours helps) and keep it uncovered in the fridge.
Should I trim the fat cap?
If your tri tip has a thick fat cap, trim it down to about 1/4 inch. If it is already thin, leave it. Optional: lightly score the fat (shallow crisscross cuts) so it renders a little better and the seasoning has somewhere to hang out.
What internal temperature should tri tip be?
- Rare: pull at 118°F to 123°F, rest and finish to 125°F to 130°F
- Medium-rare: pull at 125°F to 130°F, rest and finish to 133°F to 137°F
- Medium: pull at 133°F to 138°F, rest and finish to 140°F to 145°F
- Well-done: pull at 145°F+, finish to 155°F+ (it will be less tender, so slice it extra thin and serve with sauce)
For this cut, I strongly recommend medium-rare if your crowd is flexible. It stays tender and juicy.
Carryover note: After the final sear, the internal temp can climb more than you expect (sometimes 5°F to 10°F), especially with a thicker roast. If you want a true medium-rare, pull on the lower end of the range.
Why is my tri tip tough?
The top three culprits are: overcooking, not resting, and slicing with the grain. Tri tip’s grain changes direction, so you will slice it in two sections (I walk you through it below).
Can I cook tri tip without a cast iron skillet?
Yes. Use the heaviest skillet you have. If you only have a sheet pan, you can broil for 2 to 4 minutes per side to finish, watching closely.