Monday started with my usual grande latte. At roughly 190 calories with 2% milk, it was not the problem I expected. The surprise came on Wednesday, when a 'small treat' frappuccino turned out to carry more calories than my lunch — around 450, with most of it from sugar rather than coffee.
Thursday's iced coffee was the opposite story: black and unsweetened, it came in at about 5 calories for a tall. Adding milk and two pumps of syrup on Friday moved a similar drink to roughly 120. Same café, same order size, completely different totals — the variables are milk, syrup and size, in that order.
By Sunday the pattern was clear. Tracking did not make me give anything up; it made the choices visible. The latte stayed. The frappuccino became a once-in-a-while thing instead of a default. And I started asking for one less pump of syrup, which, honestly, I could not taste the difference in.
If you want to try the same experiment, the easiest route is to run your usual orders through a calculator before you change anything. A week of honest numbers teaches more than a month of guessing.