The original sundae is made with what ice cream flavor?

A sundae is an ice cream dessert of American origin. 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 sundae glass.

Source: Wikipedia