Cook udon noodles according to package instructions. Drain, rinse under cold water, and set aside.
In a pan, melt butter. Then add garlic, onion, and mushrooms. Sauté for a few minutes until soft and fragrant.
Add heavy cream and miso paste. Mix until smooth and combined. Bring the sauce to a boil.
Add noodles and coat them evenly with the sauce. Add salt and pepper to taste. Then top with furikake and serve hot.
