Preheat the oven to 350°
Melt the butter in a medium sized sauce pan over medium high heat and add the chopped garlic. Stir until fragrant (about one minute) and add in the heavy cream.
Season the cream and butter with salt, pepper and 1 tbs of garlic powder and stir it all together over medium low heat.
Layer the bottom of a greased baking dish with half of the thinly sliced potatoes. It’s fine to overlap them.
Now, sprinkle them with salt, pepper and ½ tbs of garlic powder. Pour over half of the cream mixture over the potatoes.
Sprinkle the potatoes with half of the Parmesan cheese and half of the shredded cheddar.
Layer the rest of the sliced potatoes on top. Season them with salt, pepper and the rest of the garlic powder, pour the remaining ream mixture on top and add the rest of the cheeses.
Cover the potatoes with tin foil and place it in the oven for 40 minutes.
Remove the foil and place it back into the oven for another 30 minutes.
Finally, let the potatoes cool for 10 minutes, sprinkle with parsley (optional) and serve warm. Enjoy!