Sarah, a couple of weeks ago I had some oatmeal using your coconut oatmeal recipe, with just the powdered coconut milk, and spices.
It was only about 4 months. When I ate it, it had a weird flavor to it, I wondered if the water was to hot and it reacted to the plastic, but I prepared it the same way as usual. My thought was the coconut powder went rancid.
Do you have any other ideas?