Preheat your oven to 375°F (190°C).
In a mixing bowl, combine the Italian dressing and thick teriyaki sauce. Whisk until well combined.
Place the chicken breasts in a baking dish and pour the marinade over them, ensuring each piece is thoroughly coated.
Cover the baking dish with aluminum foil and bake for 25-30 minutes, or until the chicken reaches an internal temperature of 165°F (74°C).
Remove the foil in the last 10 minutes of cooking to allow the chicken to caramelize.
Once cooked, let the chicken rest for a few minutes, slice, and serve with your choice of sides.