Remember how we told you that soon, Cafe World spices would have a larger importance in the game? Apparently Zynga didn't want to make us wait any longer to find out what that announcement meant, as they have released a new feature in the game, allowing you to spice your neighbors' dishes when you visit their cafes.
Adding a spice is simple. Just click on a stove with a green arrow and select "Yes," that you would like to add some spice.
If you choose to add some spice to their dishes, you'll receive the same Cafe Points and coins as if you had gone to their cafe and given one of their recipes a quick taste test (the traditional event that popped up when you visited a friend).