Place the eggs (while still in the shell) in a bowl of warm water. This will warm them up and help them whip to a higher volume. Let them sit while you prep the cake pans and the ingredients.
5 Eggs
Preheat the oven to 350°F
Grease and flour two 9-inch cake pans and place some parchment paper in the bottom of the pans. (see notes for different size pans).
Place the milk and butter in a saucepan and warm it over low heat until the butter melts. Keep the pan on the lowest heat setting to stay warm while you beat the eggs.
1¼ cup Whole milk, 12 tablespoon Butter
A stand mixer with the whisk attachment is recommended but an electric hand mixer will do the job.
Crack the eggs in a large mixing bowl and add the sugar. Beat on high speed for about 8 to 10 minutes. The eggs should triple in volume and become pale yellow in color. (see notes)
2 cup Sugar
Sift the flour, baking powder, and salt together. Add half of the flour to the egg mixture and fold in with a spatula until it is combined. Fold in the second half of the flour.
3 cup All-purpose flour, 4 teaspoon Baking powder, ½ teaspoon Salt
Add the vanilla to the warm milk mixture and gradually pour the milk into the batter. Stir the mixture by hand or on low speed. Scrape the sides and bottom of the mixing bowl with a spatula to make sure all the flour is incorporated.
1 teaspoon vanilla extract
Divide the batter into the cake pans.
Bake for 25 to 32 minutes or until a toothpick comes out clean (see the notes if you are using a different size pan).
When the cakes are finished baking, set the pans on a wire rack on the counter and let them cool in the pans.