1.Prep and Preheat :5 min.
Preheat your oven to 375°F (190°C). Lightly grease a 2-quart (typically 11x7-inch or 9x13-inch) baking dish with nonstick cooking spray to prevent sticking.
2.Season and Arrange :5 min.
In a small bowl, stir together the seasoned salt, black pepper, garlic powder, and dried thyme. Pat the chicken breasts dry with a paper towel, then season both sides evenly with the spice mixture. Arrange the seasoned chicken in a single layer in the prepared baking dish.
3.Layer Cheese and Cream :5 min.
Lay exactly two slices of provolone cheese over each chicken breast. In a separate bowl, mix the mayonnaise, sour cream, and finely grated parmesan cheese until uniform. Evenly spread this cream mixture completely over the cheese slices, sealing the chicken underneath.
4.Add Cracker Topping :2 min.
Crush your butter crackers into coarse crumbs (don't grind them into dust; a little texture is great). Evenly sprinkle the ½ cup of cracker crumbs over the entire top of the cream layer.
5.Bake Until Golden :45-60 min.
Bake uncovered for 45 minutes to 1 hour. The topping should be deeply golden brown and bubbling around the edges. Always test the thickest part of the chicken with a digital meat thermometer—it is fully cooked when it reads 165°F (74°C). Let rest for 5 minutes before serving.