I Tried the Dunkin' Cereal N' Milk Latte Hot and Iced—Here's Which One I Liked MoreThe iced matcha latte all over your feed is cheaper to make at home, and it tastes even better. Iced Matcha Latte IngredientsJOSH RINK FOR TASTE OF HOMEMatcha green tea powder: This stone-ground powder gives the latte its grassy, slightly sweet flavor and signature green color. JOSH RINK FOR TASTE OF HOMEIced Matcha Latte VariationsMake it a strawberry matcha: An iced strawberry matcha latte combines homemade strawberry syrup with milk and matcha. Iced Matcha Latte TipsJOSH RINK FOR TASTE OF HOMEWhy does my iced matcha latte taste bitter? An iced matcha latte made with half a teaspoon of matcha contains roughly 30-70 mg of caffeine, depending on the brand and grade of the powder.