I've been drinking 2% lattes for years, but soy is undeniably my go-to.

I used to pay extra to have my daily lattes made with a non-dairy alternative. At the time, I preferred the taste and often felt better on days I didn't consume as much dairy.

However, the cost of the substitution -- often around $0.80 a drink -- added up quickly. Eventually, I abandoned the habit and started ordering my lattes with 2% milk.

Luckily, Starbucks stopped charging extra for alternative milks in November, so I decided to give them all another try.

I ordered my standard 2%-milk latte alongside ones made with soy, coconut, almond, and oat milk. Then, I tried them all with and without sugar to compare.