Heat oven to 425 F. Line a sheet pan, set a rack on top, and lightly oil the rack.
Dry the wings well with paper towels. Toss with baking powder, salt, pepper, garlic powder, and a little oil.
Arrange wings on the rack in a single layer, skin side up. Bake 25 minutes.
Flip and bake 15 to 20 minutes more, until crisp and the centers reach 165 F.
Blend diced mango with 1/3 cup water until smooth.
Simmer the puree with honey, brown sugar, vinegar, lime juice, soy sauce, garlic, and minced habanero for 5 to 7 minutes.
Stir in cornstarch mixed with 1 tsp water. Cook until glossy and thick, then remove from heat and whisk in butter.
Toss hot wings with enough sauce to coat. Broil 2 minutes for extra char if you like.
Shower with cilantro and sesame seeds. Serve with extra sauce on the side.