1. Open the game interface and click the "Home" button at the lower left to enter the home page.

2. Click the "Menu" option on the home page to enter the menu page.

3. On the menu page, select the dishes to be upgraded and click the "Upgrade" button on the right.

4. In the pop-up upgrade window, check the experience value of the current dish and the upgraded effect, and click the "Confirm Upgrade" button to complete the upgrade.