Preheat the oven to 375°F (190°C).

In a mixing bowl, combine pineapple juice, brown sugar, soy sauce, apple cider vinegar, garlic powder, ginger powder, and black pepper. Whisk until smooth.

Place the chicken thighs in a baking dish and pour half of the pineapple glaze over them, ensuring they are well coated.

Bake in the preheated oven for 30 minutes.

Remove the chicken from the oven, baste with the remaining glaze, and return to the oven for an additional 15 minutes, or until the chicken reaches an internal temperature of 165°F (74°C).

Let the chicken rest for 5 minutes before serving.