Baby Shower Cake - Twins Boy & Girl

 I have been baking cakes for family and friends for a couple years now. Just a few days ago, my husband said I should stop baking so many cakes and focus more on baking my decorated cookies and cupcakes. Maybe he thinks my cakes aren't as good as my cookies and cupcakes ? ( I know he doesn't mind eating the cakes that I bake.)
 Anyhow, this is my first cake in a few weeks and it is for a baby shower for a colleague at work.
His wife is having twins; a boy and a girl ! They will be some busy parents for a few years, so they deserve a nice cake.
 Although I am using a store cake mix, I have modified the recipe and added extra ingredients that make the cake not too light and not too dense, I will find out from my colleagues tomorrow how good it tastes ??!!

Ingredients:
1 box of Duncan Hines Classic White Cake Mix
1 cup sour cream
1/2 cup milk
1/2 cup water
1 cup flour
1 cup sugar
1 box of vanilla pudding mix
3 eggs
1/4 cup oil

Directions:
In a mixer, beat at medium speed oil and sugar.
Add in eggs, mix well.
Add in sour cream.
Mix in vanilla pudding mix.
Stop mixer, add in all the rest of the ingredients.
Mix and beat batter for 3 mins.

Line 2 - 8 inch cake pan with parchment paper.
Evenly scoop batter into cake pans.
Preheat oven at 350 degree.
Bake cake for 35 minutes until toothpick comes out clean.

Let cool down and remove from pan.
Slice cake into 2 on each of the cake.
Frost and decorate cake with buttercream.