Body Watch : Tastes Great, Less Filling? : So, you think that coffee drink is more diet-friendly than your usual dessert? Here’s the skinny.

It’s easy to fall into the trap: Have a coffee drink, plain or fancy, instead of dessert. Be hip, stay slim. Well, maybe.

Depending on what brew and added ingredients you pick, coffeehouse beverages can be nonfat and low in calories or they can rack up fat grams and calories faster than you can say “hot fudge sundae.” Considering that the number of coffee cafes in the United States is expected to more than double to 10,000 by 1999, you might like to know what you’re swallowing. A partial guide to the brews:

Less than 100 calories

* Cappuccino (Coffee Beanery) w/skim milk

Size: 8 oz.

Calories: 54

Grams of Fat: 0

% Fat: 0

* Cappuccino (Coffee Beanery) w/2% milk

Size: 8 oz.

Calories: 76

Grams of Fat: 3

% Fat: 35

* Latte (Starbucks) w/lowfat milk

Size: 8 oz.

Calories: 80

Grams of Fat: 2.5

% Fat: 28

100-150 calories

* Iced Mocha (Starbucks) w/nonfat, no whipped cream

Size: 8 oz.

Calories: 100

Grams of Fat: 1.5

% Fat: 14

* Cappuccino (Starbucks) w/lowfat milk

Size: 16 oz.

Calories: 110

Grams of Fat: 4

% Fat: 33

* Cafe Mocha (Gloria Jean’s) w/2% milk

Size: 8 oz

Calories: 110

Grams of Fat: 3.5

% Fat: 29

* Skinny Latte (Gloria Jean’s)

Size: 16 oz.

Calories: 114

Grams of Fat: 1

% Fat: 8

150-250 calories

* Cocoa (Starbucks) w/ whipped cream, nonfat milk

Size: 8 oz.

Calories: 160

Grams of Fat: 8

% Fat: 45

* Iced Latte (Starbucks) w/lowfat milk

Size: 16 oz.

Calories: 170

Grams of Fat: 6

% Fat: 32

* Cafe Mocha (Coffee Beanery) w/skim milk

Size: 12 oz.

Calories: 232

Grams of Fat: 1

% Fat: 4

More than 250 calories

* Cappuccino Blast (Baskin-Robbins) w/whole milk

Size: 16 oz.

Calories: 290

Grams of Fat: 10

% Fat: 31

* Cafe Mocha (Gloria Jean’s) w/whole milk

Size: 16 oz.

Calories: 278

Grams of Fat: 10

% Fat: 32

* Cafe Mocha (Starbucks) w/whole milk, whipped cream

Size: 16 oz.

Calories: 390

Grams of Fat: 25

% Fat: 58

* Cocoa (Starbucks) w/whole milk, whipped cream

Size: 16 oz.

Calories: 400

Grams of Fat: 26

% Fat: 59

Sources: Tufts University Diet & Nutrition Letter, Baskin-Robbins, Gloria Jean’s Coffee Bean, the Coffee Beanery, Starbucks, Specialty Coffee Assn. of America.