Party Cake

I've had birthdays on the brain lately. Parker has been so good as to remind me daily about his coming up on the 9th of July, (he's been asking about it for about a month now) and Andrew's is on the 26th. So when I saw this idea for a cake on Rookie Cookie, I had to try it. However, I really dislike boxed cake mixes, so I wanted to find a really scrumptious white cake recipe. I had tried one from a cookbook a while ago and was left a bit disappointed. Here's the recipe I tried this time. I think it turned out quite nicely; maybe a smidge too sweet with the buttercream frosting; I think next time I'd try a more mild frosting for sure.

12 Tbsp. unsalted butter, softened

1 1/2 c. sugar
2 c. flour
1 Tbsp. baking powder
1/4 tsp. salt
6 large eggs whites at room temperature
3/4 c. milk
2 tsp. vanilla

Preheat oven to 350 degrees. Grease two 9 in. round cake pans and line with waxed paper.

Beat butter and sugar until light and fluffy. Add milk and vanilla; mix well. Combine dry ingredients, and add to sugar mixture. Whip egg whites and fold in.

For the crazy colors, divide the batter between a few different bowls, (I think I did 4 or 5) and add food coloring, (I've read that the store-bought cream colors give a brighter color than regular food coloring, but I'm cheap). Randomly drop spoonfuls of each color into prepared pans, (this will give a random splotchy color design; for a rainbow, drop each color into the center on top of one another until the pan is filled, and do it in reverse order in the other pan).

Does anyone out there have a smashing white cake recipe that they love? If so please share.