I know, Too Late!
I believe that when you change the Pan size you need to adjust the Leavening. I recall reading this in one of RLB’s Books (Cake Bible probably).
I also think I have seen this mentioned here on the Boards (Nannybakes perhaps?)
Iirc, it applies more to going from cake pans to cupcake pans. I routinely make a 6” cake from a 9” without any adjustment and RLB does have something to say about it but I don’t recall which book!
Pretty sure it is the Cake Bible.
I think she talks about it in the Section that she has the Pan size equivalents Chart and Wedding Cake Info.
How would you guess you should adjust going from a recipe for cupcakes to a 9x9 square?
I’d have to take a look at some info before I would venture a guess? Any chance you googled anything?
I didn’t remember it was written for cupcakes until it was in the oven
The recipe has a very small amount of leavening. The proportions are more or less that of a pound cake, so that tracks in that pound cakes typically have less leavening than many lighter butter cakes, but they’re also usually baked in different-shaped, deeper pans (loaf pan, bundt pan) for a longer time than cakes baked in flat pans take. I’m just spitballing here, but that’s what occurred to me.
We remarked that it had the texture of pound cake, so that makes sense. Thanks for your insights.