Oven failed - what to do with brownies?
Mixed up a batch, opened the oven door - no heat. Wrapped the pan in foil and froze it.
When the oven is working again, how should I cook them? Bring it back to room temp, or bake from frozen?
I'd bring it back up to room temp and bake I guess.
I thought you were planning to try stove-top cooking brownies and was going to suggest mixing in a bit more milk and making brownie pancakes. Although, to be honest, have no idea whether this would work or not, but like the idea.
Yep. You cannot safely thaw anything with fats or eggs down to room temp. You are going to have to thaw this in the fridge. It will take a LOOONG time, probably 48 hours. You can put em in the oven when the pan is still cool (in the forty degree range) but you will have to dial DOWN the oven temp a bit and then extend the cooking time.
Refrigerated batter/dough is generally not to difficult to get good results with, but you cannot put frozen dough/batter into a regular oven unless the recipe is modified and/or the cookies are in small chunks. A big block of frozen dough/batter will cook and RISE very unevenly and likely burn at the edges before the middle cooks.