Start by preparing the chicken wings. Pat them dry with paper towels and season with salt and pepper.
In a shallow bowl or plate, dredge the chicken wings in the all-purpose flour, making sure they are coated evenly.
In a deep frying pan or skillet, heat vegetable oil over medium-high heat. You'll need enough oil to submerge the chicken wings.
Carefully place the chicken wings in the hot oil and fry until they are golden brown and crispy, about 10-12 minutes. Ensure the chicken is cooked through, with an internal temperature of 75°C (165°F). Remove the wings and place them on a paper towel-lined plate to drain excess oil.
In a separate saucepan, combine the canned pineapple chunks (with juice), pineapple juice, ketchup, brown sugar, and soy sauce (if using). Stir the mixture well.
Bring the pineapple spice sauce to a simmer over medium heat. Cook, stirring frequently, until the sauce thickens and becomes sticky, which should take about 10-15 minutes.
Once the sauce has thickened, remove it from the heat.
In a large bowl, toss the fried chicken wings with the pineapple spice sauce until they are well coated.
Serve your sticky chicken wings with pineapple spice sauce hot, garnished with extra pineapple chunks if desired.Enjoy your delicious sticky chicken wings with the sweet and spicy pineapple sauce!