1. Begin by preheating your oven to a toasty 400°F. To create the accordion-style slicing, place a pair of chopsticks or wooden spoon handles on either side of a potato. Make thin, even slices (about 1/8-inch apart) across the potato, cutting down to the chopsticks to prevent slicing all the way through. Repeat this process with all of your potatoes, ensuring they’re evenly prepared.

2. In a small bowl, mix together the melted butter, olive oil, minced garlic, paprika, salt, and black pepper. Stir until the ingredients are well combined, creating a flavorful garlic butter mixture.

3. Place the prepared potatoes on a baking sheet. Generously brush the garlic butter mixture over the potatoes, making sure to get the butter in between the slices. Reserve some of the butter for basting during the baking process.

4. Pop the potatoes in the preheated oven and bake for 40-50 minutes, basting them with the remaining garlic butter every 20 minutes and rotating the baking sheet to ensure even cooking. The potatoes should fan out beautifully, with the edges becoming delightfully crispy.

5. During the last 10 minutes of baking, sprinkle the grated Parmesan cheese over the potatoes, allowing it to melt and create a golden, cheesy crust.

6. Once the Garlic Butter Accordion Potatoes are golden-brown and irresistibly crispy, remove them from the oven. Garnish with freshly chopped parsley and a sprinkle of flaky sea salt. Serve these potatoes hot and watch as they disappear from the plate in record time!