Bananas Foster is a dessert made from bananas and vanilla ice cream, with a sauce made from butter, brown sugar, cinnamon, dark rum, and banana liqueur. The butter, sugar and bananas are cooked, and then alcohol is added and ignited. The bananas and sauce are then served over the ice cream. Popular toppings also include whipped cream and different types of nuts (pecans, walnuts, etc.). The dish is often prepared tableside as a flambé.

Source: Wikipedia