Balsamic vinegar by itself is relatively low in calories. Even the low-fat balsamic vinegar blended dressings aren’t that high in calories. But when food manufacturers blend it up with high-fat oil to make a balsamic vinaigrette dressing, that’s when you’ll get way more calories than you may realize.
Drizzling plain balsamic vinegar on your salad packs on less than 30 calories per 2-tablespoon serving. You can have the same amount of low-fat balsamic vinaigrette dressing for roughly the same amount of calories. If you opt for a full-fat balsamic vinaigrette dressing made with oil, you’ll get three times as many calories -- 90 calories from a 2-tablespoon portion.