Spray a 6 qt slow cooker with cooking spray

Bring a pot of water to a boil and boil the macaroni noodles for 4 minutes

Drain the macaroni noodles and add them to the crock pot, then stir in the cubed butter until melted

Add the fresh grated sharp cheddar cheese, evaporated milk, half and half, heavy cream, garlic powder, salt, and pepper and stir to combine

Cook the crock pot mac and cheese on low for 1.5-2 hours. Check to stir 2 or 3 times. Mine was perfect right around 2 hours, but keep an eye on it as some crock pots will run hotter. Check for noodle doneness before serving