Coffee shops charging more for plant-based milk is par for the course. At Starbucks, for example, if you order a latte made with oat milk instead of dairy, you can expect to pay a whole dollar more ($6.45 instead of $5.45) for the smallest size. Plant-based options are constantly expanding — from soy and oat to almond, pea and coconut — but at a cost.

Customers have been calling for an end to plant-based surcharges for years, and recently, they’ve taken their complaints to court.