01 - Bring a large pot of water to a rolling boil. Divide the hot water evenly among multiple heatproof bowls, matching the number of colors needed.
02 - Add a small amount of gel food coloring to each bowl, mixing thoroughly until vibrant hues are achieved.
03 - Portion noodles evenly, then cook each batch in a separate colored boiling water batch for 2–3 minutes less than package specified. Rinse all noodles under cold water to halt cooking and set aside.
04 - Place a saucepan over medium heat. Melt unsalted butter fully, then add cream cheese, stirring until mixture becomes smooth.
05 - Whisk together milk, grated parmesan, cornstarch, salt, and white pepper. Gradually incorporate into the saucepan, stirring constantly until thickened and creamy, about 5 minutes.
06 - Gently fold colored noodles into the creamy sauce, maintaining separation for a cloud effect or slightly swirling for a marbled appearance.
07 - Plate immediately and top generously with sliced scallions, toasted sesame seeds, and edible flowers or microgreens if preferred.