I filled my blender about half way with instant oats and blended on high for about 2 minutes. When I took the lid off, I noticed moisture all inside the lid and and the oat powder is a little moist as well. Is it safe to store the oat powder in the original cardboard carton it came in? Should I try to get the moisture out of the powder first?
There must have been some moisture in your blender. You could bake it off the oats, or you could freeze the wet powder, or just make whatever you were going to make. But I think moist oat powder will go moldy within a few days.