Preheat oven to 350° F and lube and line bottom of (2) 8" cake pans with parchment paper. Mix dry ingredients in medium bowl. In separate bowl, beat egg whites until SOFT peaks form. In another bowl (using same beaters) blend remaining wet ingredients, including egg yolks (adding melted butter at very end). Add dry ingredients to wet ingredients and mix well. Then carefully fold egg whites into batter. Divide batter equally between both pans. Bake for 20-25 minutes for or until top is slightly browned. Carefully remove cake from pan and cool completely on wire rack.