A sundae is an ice cream dessert of American origin that typically consists of one or more scoops of ice cream topped with sauce or syrup and in some cases other toppings such as: sprinkles, whipped cream, marshmallows, peanuts, maraschino cherries, or other fruits (e.g. bananas and pineapple in a banana split).

The original sundae consists of vanilla ice cream topped with a flavored sauce or syrup, whipped cream, and a maraschino cherry. Classic sundaes are typically named after flavored syrup employed in the recipe: cherry sundae, chocolate sundae, strawberry sundae, raspberry sundae, etc. The classic sundae is traditionally served in a tulip-shaped, footed glass vase. Due to the long association between the shape of the glass and the dessert, this style of serving dish is generally now known as a sundae glass.