Preheat your oven to 425°F and line a large baking sheet with parchment paper, placing a wire cooling rack on top to allow air circulation.
Pat the chicken wings thoroughly dry with paper towels; removing all surface moisture is the secret to achieving a crackling, crispy skin.
In a large mixing bowl, whisk together the baking powder, chili powder, smoked paprika, cumin, sea salt, and black pepper until well combined.
Add the chicken wings and avocado oil to the bowl, tossing vigorously until each wing is evenly coated with the oil and spice mixture.
Arrange the wings in a single layer on the wire rack, making sure they do not touch so the heat can circulate around each piece.
Roast for 35 to 40 minutes, flipping the wings halfway through, until they are deeply golden brown and the skin is crisp.
Transfer the hot wings to a clean bowl and immediately toss with fresh lime juice and lime zest to infuse them with bright, citrusy flavor.