Preheat your oven to 425°F and line a large baking sheet with parchment paper, placing a wire cooling rack on top.
Pat the chicken wings thoroughly dry with paper towels to remove all moisture, which is the secret to achieving a crackling skin.
In a large bowl, whisk together the baking powder, sea salt, black pepper, garlic powder, and smoked paprika.
Add the wings to the bowl and toss vigorously until every wing is evenly coated in the dry seasoning mixture.
Arrange the wings in a single layer on the wire rack and bake for 35 to 40 minutes, flipping them once halfway through until golden brown.
In a separate small bowl, combine the sugar-free BBQ sauce and sriracha to create a spicy glaze.
Transfer the hot wings to a clean bowl, pour the sauce over them, and toss until they are glistening and fully coated.
Serve the wings immediately alongside the fresh, crunchy celery sticks for a balanced and flavorful meal.