Preheat your oven to 375°F.
Cut your fresh cauliflower into small, bite-sized florets resembling tiny macaroni noodles. Give the florets a thorough wash to ensure they're clean and ready to use in our tasty low-carb mac n cheese recipe.
Place the cauliflower pieces in a microwave-safe bowl with 1/4 cup of water. Microwave for 10 minutes, then drain the water.
In a saucepan over medium heat, melt the butter. Add the heavy whipping cream and garlic powder, stirring to combine.
Add the cream cheese to the saucepan and continue stirring until it melts and blends smoothly.
Add the grated sharp cheddar, mozzarella, and parmesan cheese (except for 1/4 cup of cheddar cheese) to the saucepan. Stir until the cheeses melt and form a creamy sauce.
In a large bowl, combine the cauliflower with the cheesy sauce, ensuring all the pieces are coated.
Transfer the cauliflower mixture to a greased 9" x 13" casserole dish, spreading it evenly.
Sprinkle the reserved 1/4 cup of cheddar cheese, paprika, Italian seasoning, and parsley on top.
Bake in the preheated oven for about 25 minutes, until the cheese is melted and bubbly and the top is golden brown.
Carefully remove the casserole dish from the oven and let it cool for a few minutes before serving.
Enjoy your homemade cauliflower Mac n cheese, a creamy and delicious dish!