Coffee is a low-calorie beverage. Most of coffee's calories are added when you add cream and sugar. For example, a Starbucks double Chocolaty Chip Frappuccino Blended Beverage weighs in at 410 calories for 16 fluid oz. But simple instant coffee with a tablespoon of milk can contain as little as 9 calories for a 6 oz. cup.
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Calories in Instant Coffee
One tsp. of instant coffee contains about four calories. Typically that teaspoon is combined with 6 oz. of water to make a cup of coffee. In other words, the calories in instant coffee with milk do not come mainly from the coffee.
Calories in Milk
One tbls. of nonfat milk contains five calories. A tablespoon of 2% milk contains nine calories. Whole milk contains nine to 10 calories. Half-and-half contains 20 calories.
If you prefer nondairy creamers, one packet, or 3 g, of light powdered cream substitute contains 13 calories. A tbls. of liquid cream substitute, containing hydrogenated vegetable oil and soy protein, contains 20 calories per tbls.