Measure all dry ingredients using precise volumetric spoons.
Combine the chili powder, lime powder, sea salt, cayenne, and sugar in a small ceramic or glass mixing bowl.
Whisk the ingredients vigorously for 30 seconds to ensure even distribution of the citric acid and salt throughout the chili base.
Transfer the mixture into a clean, airtight spice jar using a funnel.
Label and store in a cool, dry environment to prevent the lime powder from clumping due to humidity.