Whether you're toasting at midnight on New Year's Eve, topping off a filling holiday meal, or simply raising a glass to good health, there's a good chance you'll imbibe a cocktail or two this holiday season. If you're washing down sinful treats with equally delicious beverages, you may have to worry about more than just tomorrow's hangover. Some of the holiday's most popular libations pack more calories than a typical serving of dessert.

Sapna Lalla, registered dietician and co-founder of Poshan Complementary Nutrition (a wellness boutique in New York City) lets you know which drinks are worthy of raising your glass to—and which ones you should pass up.

5 Naughty Holiday Cocktails

  1. Eggnog. Eggs, sugar, and brandy or rum are the main ingredients of this yuletide favorite, making it high in calories and fat.  One six-ounce serving of eggnog with alcohol contains nearly 325 calories and 12 grams of fat—more than a typical cheeseburger.
  2. Martinis. A fruity martini may taste sweet, but it's bad news for your hips. When you combine the two to five ounces of liquor with the sugary syrups or juices that popular martinis (such as cosmopolitans or apple martinis) are mixed with, this drink could weigh in at more than 800 calories.
  3. Hot Toddies. Made with brandy or whiskey, honey, tea, and lemon, a hot toddy containing two ounces of liquor will serve up a strong buzz, along with almost 200 calories—and that's without the whipped cream topping. 
  4. Margaritas. Thanks to the sugar-laden mix and high-calorie tequila, a regular margarita, either frozen or on the rocks, boasts a whopping 400 calories. It's definitely not a drink that your diet will thank you for.
  5. Mixed Drinks. The fancier the mixed drink, the faster the calories can add up. One and a half ounces of an 80-proof spirit (such as vodka or rum) contains 65 calories. Add six ounces of sugar-laden soda, juice or syrups, which can pack on hundreds of extra (and empty) calories, and you're no longer enjoying a "light" drink. A Long Island Iced Tea, for example, can hit about 250 calories.

5 Nice Holiday Cocktails

  1. Champagne. At 120 calories for a five-ounce flute, you can drink to your weight-loss resolution without feeling guilty.
  2. White Wine Spritzers. Half white wine and half club soda, a six-ounce wine spritzer tops out at about 60 calories and zero grams of fat.
  3. Red Wine. Recent studies show that the benefits of drinking a glass of red wine include a healthy dose of disease-fighting and age-defying antioxidants. A five-ounce glass of wine typically weighs in at 120 calories.
  4. Beer. A bottle of regular beer contains 150 calories to the bottle, while a bottle of light weighs in at about 100 calories. Despite its bad reputation as causing beer bellies, a bottle of beer is actually a wiser choice than most cocktails.
  5. Vodka (or Gin) and Soda. Most mixers with 1.5 ounces of 80-proof spirits and club soda have less than 100 calories and no fat. Top this refreshing drink with a wedge of lime or other fruit for added flavor.