Calories in Starbucks Signature Iced Brown Sugar Oat Shaken Espresso with lactose-free milk run from 101 in a Tall to 156 in a Venti, only offered in Tall, Grande, and Venti sizes.
A Grande has 130 calories with 19.4g of sugar, identical to the whole milk listing. That’s because this drink always finishes with oatmilk regardless of which “milk” name appears on the label, so the lactose-free tag here doesn’t change anything about the recipe.
If you’re avoiding dairy specifically, this drink is already a safe bet no matter which milk variant you see it listed under, since oatmilk is the only base actually used.
Signature Iced Brown Sugar Oat Shaken Espresso - lactose-free milk Nutrition Facts
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Signature Iced Brown Sugar Oat Shaken Espresso - lactose-free milk
–/100Calories
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Long-Term Health Impact
After 1 Week
Drinking a daily Grande Signature Iced Brown Sugar Oat Shaken Espresso - lactose-free milk adds 910 calories to your week — about 175 minutes of brisk walking to offset.
After 1 Month
Over a month, that's 3900 calories — roughly 1.1 lb of potential weight gain if it isn't offset by activity.
After 1 Year
Over a year, a daily Grande Signature Iced Brown Sugar Oat Shaken Espresso - lactose-free milk totals 47450 calories and 7.1kg of sugar — equivalent to about 474 miles of jogging to burn off.

