First, preheat your oven to 400°F and line a baking sheet with parchment paper or spray it lightly with nonstick spray. Pat the chicken pieces dry with paper towels; this ensures the flour mixture sticks well.
Arrange the chicken pieces on the prepared baking sheet in a single layer, making sure they aren’t crowded. Bake for 20 minutes, then flip each piece and bake for another 15 minutes, or until golden and cooked through.
While the chicken bakes, prepare the pineapple jalapeno glaze. Heat the pineapple juice, brown sugar, jalapenos, lime juice, soy sauce, and chili powder in a medium saucepan over medium heat. Stir frequently as it simmers, allowing it to reduce into a sticky, flavorful glaze. Taste and adjust the sweetness or heat to your liking.
Once the chicken is baked, transfer the pieces to a mixing bowl. Pour the glaze over and toss until each piece is fully coated. For an extra caramelized finish, pop the glazed wings under the broiler for 3-5 minutes, watching closely to avoid burning.