What is used as a top ingredient in a Grape Crush cocktail?

The top ingredient in a Grape Crush cocktail is club soda. This carbonated mixer adds effervescence to the cocktail, enhancing its texture and providing a refreshing quality. The inclusion of club soda helps balance the sweetness commonly found in grape-flavored drinks.

Grape Crush cocktails typically feature grape schnapps or a similar grape liqueur, and using club soda as the top ingredient creates a lighter, more palatable drink. This fizz contrasts well with the sweetness of other ingredients, making it a popular choice for cocktails that aim to be both flavorful and refreshing. The carbonation from the club soda also gives the drink a lively appearance, appealing to those who enjoy visually enticing cocktails.