Last week Martha had on a layer cake with an Orange Almond layer cake and Italian Buttercream Frosting - is this the same cake recipe? It is the only Orange Almond cake I can find in her recipe search?
1/2 cup flour is not a typo. The body of the cake is made mostly from the ground almonds (aka almond meal). Besides having more protein and fiber (and less carbs) than regular flour, ground almond also adds a nuttier flavor to the cake.
My sister has this same recipe though she can't remember where she got it. It's identical except it calls for 1 1/2 cups of flour. She says it turned out perfectly delicious.
By chance is there a typo in the above recipe for the amount of flour, stated here as only 1/2 cup? Seems like a small amount for 6 eggs and 1 cup of sugar etc.