Preheat the oven to 400°F (200°C) and lightly grease a 9x13-inch baking dish or rimmed baking sheet.
Pat the pork chops dry with paper towels and arrange them in a single layer in the prepared dish.
In a medium bowl, mix mayonnaise, ranch dressing mix, garlic powder, black pepper, and a pinch of salt until smooth.
Spread the ranch mixture evenly over the tops of each pork chop.
Sprinkle shredded cheddar cheese evenly over the coated pork chops.
Bake for 22–28 minutes until pork chops reach an internal temperature of 145°F (63°C) and cheese is melted and bubbly.
Optionally, broil for 1–2 minutes to brown the cheese, watching closely to prevent burning.
Remove from oven and let rest for about 5 minutes before serving.
Garnish with chopped fresh parsley if desired and serve warm.