Add the eggs to the remaining frosting in the bowl and beat on low just until blended.
In a separate bowl whisk together the flour, baking powder and salt. Add flour mixture to the frosting mixture alternately with the remaining 2/3 cup of milk in 3 additions beginning and ending with the milk. Beat on low speed after each addition just until blended then after the last addition continue beating 1 - 2 minutes or until well blended.
Pour into pan and bake 65-75 minutes or until a toothpick inserted in center comes out clean. Cool in pan on wire rack - while cake is still warm use a knife to loosen the the cake from the side of the pan.
Once cool turn out from pan onto a serving dish. Spoon the frosting over top of the cake allowing it to drip down the sides of the cake.