Question: how many calories in a large oat milk latte?
Answer: A grande-sized oat milk latte at Starbucks has 2g of fiber and 1g of protein, which is something to note, but not worth celebrating, Horton says. There's about 270 calories in the drink at this size, which isn't alarming, but the 28g of sugar and 42g of carbohydrates overall may be more of a strain on your daily diet.