1. Preheat your oven to 400°F (200°C) and generously butter a muffin tin.
2. In a large bowl, combine the melted butter, Parmesan cheese, garlic powder, salt, and pepper. Stir until well blended.
3. Add the potato slices to the bowl, ensuring each slice is well coated with the butter mixture. This step reminds me of how my abuela would meticulously coat each tortilla before placing it on the skillet, ensuring each bite was flavorful.
4. Stack the potato slices in each muffin cup, filling them to the top. As you do this, sprinkle a pinch of thyme leaves between layers for an aromatic touch.
5. Bake in the preheated oven for 45-50 minutes, or until the tops are golden brown and crispy. The smell wafting through your kitchen will be reminiscent of family gatherings, where the anticipation of dinner made every moment delightful.
6. Once done, allow them to cool for a few minutes before gently removing them from the tin using a small spatula or knife.

These steps are straightforward, and you’ll find that the process of stacking and seasoning can be quite meditative — a small act of care that transforms simple ingredients into something extraordinary.