title_body: Is there a "standard" ratio of espresso to milk in a latte?
upvoted_answer: It varies by shop and order.  For instance, order a latte at Starbucks, you have a selection of sizes, and then variance in the number of shots (or espresso) you order in the drink.  Since the sizes are not doubled (12, 16, 20 ounces, not 12, 24, 36) and half shots are not a thing, the ratio will vary at the order level.