INGREDIENTS
2 1/2 cups
sifted cake flour
1 1/3 cups
sugar
1 tbsp
baking powder
1 tsp
salt
1/2 cup
vegetable oil
5
large eggs, separated
3/4 cup
fresh orange juice
3 tbsp
orange zest
1/2 tsp
cream of tartar
Lemon-Orange Buttercream Frosting
Garnishes: edible flowers, kumquat slices