Break the ramen noodles, add the soup base and sugar into the bag, and shake well to coat the noodles.

Place the seasoned noodles in an air fryer and cook at 160°C for 5 minutes.

In a pot, melt the butter over medium heat.

Add beef brisket and sliced green onion, and stir-fry until the meat is cooked.

Pour in the milk and bring it to a gentle boil.

Add the ramen noodles, half of the soup base, and tsuyu.

Cook until the noodles are done to your liking, then transfer to a serving bowl.

Top with a fresh egg yolk and serve immediately.