If you’ve ever tasted “hot chocolate” in Europe, you’ve had this happy sensation: Your neurons burble, “Whoo, boy! This is not Mom’s watered-down mix, this is the real deal.” Starbucks knows that thrill. Witness Chantico. Introduced to the coffee giant’s menu last month, it’s a sinfully rich drinking chocolate, handmade from top-notch cocoa powder, cocoa butter, and whole steamed milk. And we wholeheartedly approve. But why the funny name? Seems Chantico is the Aztec goddess of the hearth. Bet she never went for the ­watered-down stuff, either.