01 -
In a Dutch oven or large saucepan over medium-high heat, whisk together water, heavy cream, garlic powder, onion powder, paprika, and mustard powder until the spices dissolve and the mixture comes to a boil.
02 -
Reduce heat to medium to maintain a rapid simmer, then add the uncooked shell pasta. Cook uncovered, stirring every minute, until pasta is al dente and most liquid is absorbed, approximately 8 minutes.
03 -
Remove the pot from heat, stir in Velveeta and cheddar cheese until fully melted and incorporated. Season with salt and pepper to taste, then serve promptly.