For a smoother texture, soak oats in water for 15 minutes, then drain and rinse thoroughly to remove excess starch.
Add soaked (or rinsed) oats and 4 cups of fresh filtered water to a high-speed blender. Blend for no more than 30 seconds to avoid sliminess.
Pour mixture through a nut milk bag, cheesecloth, or fine mesh strainer into a bowl or pitcher. Do not squeeze—let it drain naturally to keep texture light and smooth.
Stir in vanilla, cinnamon, sea salt, or blended Medjool dates for a cozy, naturally sweet taste.
Transfer oat milk to a sealed glass jar or bottle and refrigerate for up to 4–5 days. Shake well before each use, as natural separation will occur.