Preheat your oven to 375°F (190°C). Lightly spray a 9×13-inch baking dish with nonstick cooking spray.
In a shallow bowl, beat the eggs. In another bowl, stir together the crushed Ritz crackers, garlic salt, black pepper, onion powder, and ranch seasoning.
Dip each chicken breast into the egg, then into the cracker mixture, pressing lightly to help the coating stick.
Arrange the coated chicken in the prepared baking dish. Place the butter cubes on top of the chicken.
Bake for 25–30 minutes, or until the chicken is cooked through and the crust is golden. The internal temperature should reach 165°F. For a crispier top, broil for 2–3 minutes at the end—just watch closely!