A 20-ounce mocha drink from Starbucks (with whole milk and whipped cream) is 510 calories. Add a muffin and you've got a 900- to 1,000-calorie snack.
For an average-size woman, that represents more than half the recommended number of daily calories. (For an average-size man, it's just about half the daily calories.)
A more calorie-conserving choice is a Starbucks 16-ounce nonfat cappuccino (only 110 calories) and a biscotto. The calorie total: 210.