Starbucks rewards members can purchase one receive one free drinks from noon to 6 p.m. on March 14.
On Thursday, Starbucks app users can utilize the promo to order on their phones or ask their barista to apply it at checkout.
Everything, even new cocktails like the Luck of the Matcha Créme Frappuccino, is free.
The limited-edition frozen drink is “inspired by a pot o’gold at the end of the rainbow,” a release says.
A caramel-sugar crunch, whipped cream, and additional caramel sauce top the matcha-caramel syrup cocktail. It's available March 12.
Both new Starbucks spring drinks are available for Thursday's freebie.
Lavender powder in blonde espresso makes a drink as tasty as matcha but less vibrant.