1. Dice onion, slice mushrooms and butter for later use.

2. Heat the pot and add butter and onion.

3. Take another pot (or take the onion out), add the butter and flour, heat it on low heat and stir it evenly.

4. Add a proper amount of water to the enamel pot and continue to stir until the flour and butter are completely blended.

5. Add the fried onions, mushrooms and whipped cream into the pot and stir well.

6. Cover the lid and simmer for 2 minutes, then sprinkle with fragrant leaves to taste.