Preheat your oven to 400°F (200°C).

Wash the Russet or Yukon Gold potatoes thoroughly and pat them dry.

Carefully slice each potato into thin slices, about 1/8 inch thick.

In a small bowl, combine melted unsalted butter, minced garlic, grated Parmesan cheese, and finely chopped parsley. Whisk until well blended and season with salt and pepper.

Fan out the sliced potatoes on a baking sheet, cut-side up. Brush the garlic butter mixture generously over each potato.

Place the baking sheet into the oven and bake the potatoes for 30 to 40 minutes until golden brown and crispy.

Once crispy and tender, allow the potatoes to cool slightly before serving.