@Thanks for the CrepesThanks for the reply!
I didn't have much choice unfortunately. I contacted a few neighbors but the first ones haven't had a functioning oven for years (no idea how they survive - I use mine every day), and the others weren't home. So the unbaked cake went in the freezer and I am keeping my fingers crossed. There were egg whites but the batter was rather dense overall. Some people in this thread (for example the second post in the discussion) mentioned freezing molten chocolate cakes unbaked, so I remain hopeful for now... The uncooked batter tastes really good and my daughter was trying to convince me to eat it as is!!! 
