Secret menus—unofficial, creative combinations of standard menu options—have been a thing at many chains over the years, including Starbucks. Most remain secret, but Starbucks just pulled back the curtain by officially adding four "secret" drinks to their menu. Plus, they've launched a contest to find the next big drink and you could win big.

Starbucks is now officially taking part in the secret menu trend.

"Submit your best Grande custom drink and we’ll see how it stacks up based on taste, creativity and fan appeal," Starbucks said.