>My grandmother used to make a hot milk orange >chiffon cake. I miss her
>and I miss her cake. We are 4500' here so I need high >altitude
>adjustments if possible.

Interesting....
I have baked various chiffon cakes for years and never heard of hot
milk chiffon cake.
Milk is not an ingredient for chiffon cakes but commonly added to
sponge batters.
I was wondering the cake might be wrongly named and what your grandma
did was actually a hot milk orange flavored based sponge cake?

Could you please show the recipe so that we can check what really is?