Even if the oat milk is within the 4-day window, if you notice any of these signs of spoilage, it's best to discard it. When in doubt, it's better to err on the side of caution and make a fresh ...
For an easy upgrade, swap half or all of the water for milk. Oat milk is a great non-dairy alternative—look for a brand with a simple ingredient list, sans sweeteners or stabilizers. You can use any ...