I was actually wondering what kind of cake this classifies as…it contains baking powder and whipped egg whites. No butter, but oil. Butter/oil cake? Sponge?
: ( pic is too big and won’t upload
Here it is…
Both the forumla and technique look to me to be a chiffon, which is a sponge-type cake.
Brød & Taylor Test Kitchen: Peanut Butter Cups, All Grown Up