Snack with a Mega Stuf variety

OREO

Think of the creamy cookie that famously asks you to "twist, lick, and dunk."

This clue refers to a popular cookie brand known for its creamy filling, specifically calling out the "Mega Stuf" version that has extra filling. "Snack" hints at something edible and often handheld, while "Mega Stuf" is a well-known product line of Oreo, making it a direct reference. The answer is straightforward once you recognize the brand associated with that variety.