Classic Milk Cake

Instructions
Preheat the oven to 350 degrees F.
Grease a 9×13 inch baking pan with a little butter and set aside.
In a large bowl, beat the eggs with with an electric mixer on medium to high speed for a full five minutes or until they are lemon yellow in color and very thick. TIP* It is important to be sure you mix the eggs for a full five minutes.
Gradually add the sugar to the eggs, one cup at a time and beat on medium speed until the mixture is light and fluffy.
In a separate bowl, stir the baking powder and salt into the four to combine.
Slowly add the dry ingredients to the egg/sugar mixture using low speed on the mixer. Do not over mix.
