Seeing as the mixture was so thick and had flour in it after adding the oat powder, I decided to try baking it and seeing what happened. It worked! It was pretty bland, it tastes much better and is much sweeter in drink form. It is also very dense. This could be a way to get solid food if you are trying to stay purely on soylent. I am not sure of the effect on the nutrients by cooking it, perhaps someone else has some thoughts here. I know proteins could denature, but other than the creatine I think that is ok as long as all the amino acids are intact.
I baked it as 325F (163C). I tried 375F (190C) first, but the outside was cooking too quickly. I didn’t time it, just kept checking on it. I will update if I make any more and watch the time.