What happens if you cook pureed pancakes?
When you cook it, the mixture would go from firm to melted as the temperature increased above the freezing point. Also, your egg proteins that previously held it together will have already been denatured (no way to undo this step mechanically) with the first cooking episode so I'm not aware of anything that would hold the batter together once it melted unless you added more egg. Also, you would not have the bubbles expected in pancakes without adding more baking soda/ powder (as previously mentioned) or putting the mixture in a siphon with nitrous. Either way, probably not a very pleasing result unless you put the batter in a siphon, charge it up, freeze it, and make sure it remains frozen until consumed. In that case you would have frozen pancakes not much different than freezing the original subject other these would melt into a mess with the consistency of the batter upon thawing.