Preheat the oven to 425°F (220°C).
Wash and scrub the potatoes thoroughly.
Make horizontal cuts in the potatoes, ensuring not to cut all the way through.
Combine the melted butter, minced garlic, rosemary, thyme, salt, and pepper in a bowl.
Brush the garlic butter mixture generously over the potatoes, allowing it to seep into the cuts.
Place the potatoes in a baking dish and cover with aluminum foil.
Bake for 30 minutes, then remove the foil and bake for an additional 15-20 minutes until crispy and golden.
If desired, sprinkle grated Parmesan cheese on top during the last 5 minutes of baking.
Let the potatoes cool slightly before serving, garnishing with additional herbs if desired.