Measure the salt, cayenne pepper, black pepper, and garlic powder into a stainless steel or glass mixing bowl.

Whisk the ingredients vigorously for 60 seconds to ensure a homogenous distribution of spices and to break up any clumps in the garlic powder.

Transfer the finished blend into a clean, dry, airtight spice jar using a funnel.

Label the container and store in a cool, dry place away from direct sunlight to preserve volatile oils and prevent caking.