A Caffe Latte (or simply Latte) is an espresso coffee drink with a large amount of steamed milk.

Espresso-based drinks at Starbucks generally use the following rule:

One shot in a Tall beverage, two shots in a Grande, and three shots in a Venti.

Caffeine content in coffee can vary enormously due to the length roasting, coffee blend (amount of arabica vs robusta beans), and even extraction length.

Note that other analyses have come up with a value of 58 mg of caffeine per espresso shot*.