Which of the following cocktails includes cream as an ingredient?

The cocktail known as a Separator is indeed distinguished by its inclusion of cream as an ingredient. This drink typically combines other ingredients like brandy and chocolate liqueur, but cream is essential for achieving its rich, smooth texture and luxurious mouthfeel. The presence of cream differentiates it from other cocktails, making it creamier and often richer in flavor.

In contrast, the other cocktails listed do not traditionally contain cream. For example, a Sex on the Beach is known for its fruity profile, featuring vodka, peach schnapps, cranberry juice, and orange juice. Similarly, the Singapore Sling is a complex cocktail that incorporates gin, cherry brandy, and various fruit juices, without the use of cream. The Silk Panty, a simpler vodka and peach schnapps drink, also does not rely on cream for its composition. Hence, the Separator stands out as the only option that properly includes cream, highlighting its unique character among these cocktails.