There are many ways to add friends in the game.

1. Within the game!-Open your friends list, then search players by their ID or add players recommended by system.-OR, click the the profile of a player you see in the market, then visit their Cafe and add them. 

2. Add your Facebook friends! Connect to Facebook and all your friends who play Cooking Country will appear in your friend list automatically.

Please take a look at the image below for reference.