Baby cake

I work a couple days a week at a doctor's office that happens to have an ultrasound machine and a wonderful tech willing to peek at my twins when I'm there.  She said that she can usually tell the sex by 16 weeks.  Last week I was 16 weeks, so I dashed right to her office.  However, since my husband wasn't with me, I didn't think it was fair to find out the sexes without him.  We remembered an article in Food Network magazine titled "Baby Cakes" that explained some couples find out the sex in a cake.  If the baby is a boy, the cake is dyed blue and if the baby is a girl, the cake is dyed pink.  It is covered in thick icing and when the couple cuts into the cake, the sex is revealed.  I loved this idea and knew I wanted to find the sexes out this way.
Instead of a bakery though, I asked my mom to make the cake since she's a better baker and I knew the cakes would be tasty.  Here's how the day unfolded:  I went to work, got my ultrasound, the tech wrote the sexes down on a piece of paper and sealed it in an envelope.  My mom took it and went home to make the cake.  Since we're having twins, she made a 2 layer cake and each layer would be dyed a different color (or the same color, depending on what we have).  I, meanwhile, continued to work and imagined what the sexes would be.  Finally, work ended and my husband drove to my parent's house for the big revealing.  We cut into the cake and the first layer was blue (boy!!) and the second layer was pink (girl!!).  I think I screamed, my husband shouted "I knew it!", my dad laughed, and my mom said "That was the hardest secret I have ever kept!" 
I thought this was an amazing way to find the sexes of our twins out.  Instead of being in a doctor's office where the atmosphere is very formal, we were relaxed at home and celebrated right away with cake.  Granted, the wait was terrible, but once we cut into the cake the joy and excitement was something I'll never forget. 
Following are pictures of the cake and the recipe.  I gave my mom my recipe for easy white cake and it's one of favorites.  The crumb is dense, but light.  It has loads of flavor (most white cakes taste like nothing) and if you dye your cake, add the coloring after you have separated the batter into the pans. 

My recipe for white cake:
2 2/3 cups all purpose flour
2 teaspoons baking powder
1 teaspoon salt
2/3 cup milk
6 XL egg whites
4 tablespoon sour cream
2-3 teaspoons pure vanilla extract
2 sticks unsalted butter at room temperature
2 cups sugar

Preheat the oven to 350
Sift flour, baking soda, and salt in a bowl and set aside
In another bowl (or measuring cup) combine milk, egg whites, sour cream, and vanilla
Whisk together until sour cream is incorporated and there's no lumps
Using an electric or hand held mixture, cream butter and sugar at least 5 minutes, until light and fluffy
Add 1/3 of the flour mixture and mix until incorporated
Add 1/2 of the wet mixture
Add another 1/3 of the flour mixture
Add last 1/2 of the wet mixture
Add last 1/3 of the flour and mix until just combined (do not overmix!)

Divide the batter into 2 9 inch greased and floured pans (line the bottoms with parchment paper too)
Bake until a toothpick comes out clean 40-50 min. (depending on your oven- check often so they don't burn)
Set pans on a cooling rack and cook cake in pans for 10 min.
Run a knife around the edges and carefully take cake out of the pans
Cool on cooling rack until completely cooled and ice with your favorite frosting