Pat chicken pieces completely dry with paper towels, then season all sides generously with salt, black pepper, garlic powder, onion powder, and smoked paprika. Let seasoned chicken rest for 3 minutes while you prep remaining ingredients.
Heat olive oil in a large skillet over medium-high heat until shimmering, about 1 minute. Working in batches if necessary, place chicken skin-side down in the hot pan and sear without moving for 5-6 minutes until golden brown.
Flip chicken pieces and sear the other side for 4-5 minutes until golden. Transfer to a plate and set aside while you build the glaze base.
In the same skillet, melt butter over medium heat, then sauté sliced onion and minced garlic for 2 minutes until fragrant and softened. This aromatics base creates the foundation for your maple glazed chicken recipe's signature depth.
Whisk together pure maple syrup, Dijon mustard, and apple cider vinegar in a small bowl, then pour into the skillet with onions. Stir constantly for 1-2 minutes as the glaze bubbles and caramelizes slightly.
Return chicken to the skillet, nestling pieces into the glaze and adding chicken broth around (not over) the chicken. Scatter fresh thyme over top, then reduce heat to medium and simmer uncovered for 12-15 minutes until chicken reaches 165°F internal temperature.
Whisk cornstarch and water together to create a slurry, then stir into the simmering glaze for 1-2 minutes until it thickens to coat the back of a spoon. This glazed chicken will now cling beautifully to each piece.