> highly recommends a 10" cast iron skillet. *

1 1/2 C. flour - even with 3 eggs - that's a pretty thin sponge cake
to put underneath the weight of the butter, brown sugar and pineapple
spread out in a 10" pan. That's just my opinion, of course.

I like some cake along with my buttered, sugared pineapple ;-) I can
see this batter doing fine in an 8" round pan.

N.