Bring a large pot of water to a boil and cook the noodles according to the package instructions. Drain noodles and wipe the pot clean. Return the pot to medium-high heat and add the butter. When the butter is sizzling and bubbling a bit, add the green onion and the garlic. Fry for 1 minute or until very fragrant; be careful not to let the garlic burn.
Add the brown sugar, Maggi Seasoning and oyster sauce and stir well to mix everything evenly. Add the noodles and toss vigorously to get the good stuff evenly distributed throughout the noodles.