If the tri-tip has a fat cap, remove it. Also trim any scraggly pieces, any silverskin, any hard fat from the surface, and trim any edges that are thin.
Combine seasoning in specified quantities and apply to all sides of the tri-tip.
1/4 cup Diamond Crystal Kosher Salt, 2 tbsp Granulated Garlic, 1 tbsp 16 Mesh Black Pepper
Get Your Smoker to 225-250F
Once at temperature, put a chunk of your favorite hardwood on - I used post oak.
Put tri-tip on indirect.
Replace hardwood every 45-60 minutes.
Smoke Until the Bark is Dark OR Internal Temperature 165-170F
Once either of these happen, take off the smoker and wrap in aluminum foil. Put 3 pats of butter on top of the tri-tip before wrapping.
3 tbsp Unsalted butter
Return to your smoker OR kitchen oven set to 250F.
Check for Tenderness After 1 Hour Cooking Wrapped
Use a probe or toothpick to poke and prod the meat. It should glide in and out with no resistance. The internal temperature should be around 195-205F.
Once the Meat is Tender, Leave Wrapped and Rest
Allow it to rest for 1 hour in a Cooler or in your kitchen oven while OFF.
Slice Meat Against the Grain
Tri-tip has 2 grain directions and it's important to slice against the grain to make the meat tender.
Use my linked article above to see how.
IF THE MEAT IS DRY! This can happen with tri-tip smoked this way.
Dunk the meat in the butter from the wrap OR make a horseradish dipping sauce.
To make the sauce, combine in a bowl the following.