Pastel de Tres Leches

This recipe is from the "Kitchen Queen" herself, Martha. I made it for Oliver's birthday a couple of years ago and it became an immediate favorite. It is cake soaked in milk, so if you have texture issues...this isn't for you.

FORMULA:

1 stick butter (8 tablespoons), melted and cooled, plus more for pans
6 large eggs, separated
1/4 teaspoon baking soda
1/4 teaspoon salt
1 cup sugar
1 cup all-purpose flour
2 1/2 cups milk
One 12-ounce can evaporated milk
One 14-ounce can sweetened condensed milk

PROCESS:

Heat oven to 350 degrees. Generously butter a 9-by-13-inch glass baking pan. In an electric mixer fitted with the whisk attachment, combine egg whites, baking soda, and salt, and beat on medium speed until soft peaks form, 2 to 3 minutes.

.

Add yolks to the whites, and beat until completely combined. With the mixer running slowly, add sugar until combined. Remove the bowl from the mixer. Using a rubber spatula, fold in butter.
Sift 1/4 cup flour on top of the mixture, and fold in to combine. Repeat with the remaining flour, folding in 1/4 cup at a time. Pour the batter into the prepared pan, and bake until golden and a cake tester inserted into the middle comes out clean, 20 to 25 minutes. Remove from oven, and transfer to a wire rack.

.
About 5 minutes before the cake is done, whisk together the three milks, and set aside. As soon as the cake is removed from the oven, pour the milk mixture over the entire cake. The cake should absorb all the liquid within 3 to 5 minutes. Set cake aside, and let stand until cool. Cover cake well, and transfer to the refrigerator to chill, at least 5 hours or overnight.