Measure out each spice into individual bowls. This lets you add only as much as you want, per taste, for each spice. Start with equal portions of each spice in a clean mixing bowl. This 1:1 ratio is a great place to start.
3 tablespoon sea salt, 3 tablespoon black pepper, 3 tablespoon granulated garlic, 3 tablespoon paprika, 3 tablespoon thyme
If making a bulk amount, wear a disposable face mask so you don't start sneezing from the pepper and paprika!
Blend the Montreal Steak Seasoning ingredients together well. Taste a pinch to see if you need to increase the any spice.
PRO TIP: You can't decrease any spice in the mixed blend, but you can increase the amounts of all but the spices you want less of, so the ratio is changed. Keep notes on any adjustments you make so you can make your blend again.
Store your homemade Montreal steak seasoning in air tight jars, and keep in a cool, dry, and preferably dark cupboard or pantry. Keep them away from heat or steam sources (such as next to the stove).
Since you have no anti caking ingredients in your steak seasoning recipe, add two or three dry beans to absorb any humidity, which will prevent your spice blend from hardening up in the jar.