Slice the king oyster mushrooms and onion into thin pieces.

Heat salad oil in a frying pan over medium heat, add the shrimp, and cook until they turn white. Remove and set aside.

In the same pan, melt the butter, then add the onion and mushrooms. Sauté until softened. Sprinkle in the flour and cook until the flour is no longer raw.

Gradually add the milk while stirring. Once the mixture thickens, add the cooked shrimp, salt, pepper, and consomme powder. Adjust seasoning to taste.