-
Set oven to 325 degrees F. (lowest oven rack).
-
Prepare an ungreased 10-inch tube pan.
-
Let the eggs stand out at room temperature for 30 minutes.
-
In a large mixing bowl combine flour, sugar, baking powder and salt.
-
In another bowl whisk the egg yolks with water, oil, lemon peel and vanilla; add to the dry ingredients and beat until well blended.
-
In another large mixing bowl beat egg whites and cream of tartar on medium speed until soft peaks form; fold into the batter.
-
Gently spoon into prepared tube pan, then cut through batter with a knife to remove the air pockets.
-
Bake on lowest oven rack for 50-55 minutes or until the top springs back when lightly touched.
-
Immediately invert the pan.
-
Cool completely (about 1 hour).
-
Run a knife around the side and center tube of the pan.
-
Remove cake to a serving plate.
-
In a small bowl combine frosting ingredients; beat until smooth.
-
Spread over top of the cake.