Fattening others

Most effective weight gain .... fats and sugar, sugar and fats

Cream and sugar, sugar and cream
fried bread with sugar, Donuts!!
cake with icing, icing made with shortening and sugar!

My wife loves egg nog. So whenever I buy some for her from the store I wait until she opens it, and fill it with Heavy cream. She hasn't noticed, and it slides a few hundred extra calories on a already fattening drink.