Which step is common to both the Tall mocha and the Grande classic chai tea latte preparation process?

The preparation of both the Tall mocha and the Grande classic chai tea latte involves steaming milk, which is a fundamental step in creating these beverages. For both drinks, the process requires that the milk be frothed to the correct temperature and texture. This is crucial in achieving the right creaminess and flavor consistency that are hallmark characteristics of these drinks.

Steaming milk for the appropriate amount of time allows for the development of microfoam, which enhances the overall mouthfeel and presentation of the final product. While the specific amount of milk, syrup, and other components may differ between the two drinks, the technique of steaming milk is integral to both of them, making it the common step in their preparation.