I would say a day max as I did it and all turned out fine! I try to avoid doing this because the ingredients tend to separate like oil and water do when settled. Even though you can remix it,,it's not the same consistency.
That's all I know..maybe someone else knows better.
It is best not to keep it more than a few hours.
There are a few threads on this site where people (IndyDebi) froze her batter and it worked out fine but overall my experience is the batter will not rise properly (if at all) and the cake though still nice, won't be up to the highest standards I prefer to put out.
I have placed leftover cake batter in the refridgerator overnight with no problems at all. Hope that helps!
Thank you for your replys. I guess I have to do a trial an error. I have limited time on a commercial kitchen & I needed to make the most of that time.
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