Boil water in a large pot. Add macaroni and cook according to the package instructions until al dente. Drain and rinse with cool water. Set aside.

Step 2: Make the Roux

In a medium saucepan, melt the butter over medium heat. Once melted, add the flour, white pepper, garlic powder, onion powder, and salt. Stir continuously until it forms a smooth paste.

Step 3: Add the Cream

Slowly pour in the heavy cream while whisking. Keep stirring until the mixture becomes smooth and slightly thickened.

Step 4: Add the Cheese

Reduce heat to low. Add grated white cheddar, Romano cheese, and cream cheese. Stir continuously until all cheese melts and the sauce becomes smooth and creamy.

Step 5: Combine

Add the cooked macaroni to a large bowl. Pour the cheese sauce over the pasta and mix until evenly coated.

Step 6: Serve

Serve immediately while hot and creamy. Garnish with extra cheese if desired.