Calories in Oat milk, unsweetened, plain

What makes oat milk so powerful?

Oat milk emerged commercially in the 1990s when Swedish scientist Rickard Öste developed a process to enzymatically break down oat starch into simpler sugars, creating a naturally sweet beverage without added sweeteners. The production method involves soaking oats in water, then using enzymes (typically alpha-amylase and beta-amylase) to convert some of the grain's complex carbohydrates into maltose and glucose. This enzymatic process is what gives unsweetened oat milk its subtle sweetness despite containing no added sugar. Unlike nut milks that require straining out most of the solid material, oat milk retains more of the grain's soluble fiber, particularly beta-glucan, which gives the beverage its characteristic creamy texture and slight viscosity. The fiber content also explains why oat milk froths well for coffee drinks—the beta-glucan molecules help stabilize air bubbles. Commercial oat milk typically uses oat varieties bred for high starch content rather than the steel-cut or rolled oats used for porridge.