1 cup (2 sticks/8 oz./226g) butter, softened *(see note below)
1 1/2 cups granulated sugar
3 large eggs
3 large egg yolks
1 tablespoon vanilla extract
3 1/4 cups cake flour
2 1/2 teaspoons baking powder
1/4 teaspoon salt
1 1/4 cups milk
1. Preheat oven to 350 degrees F/180 degrees C. Butter and flour two 9-inch round cake pans.
2. In a bowl, with a mixer on medium-high speed (use the paddle attachment if using a standing mixer), beat butter and sugar until fluffy and pale yellow, 4 to 5 minutes. Add eggs, then yolks, one at a time, beating well after each addition and scraping down sides of bowl as necessary. Beat in vanilla.
3. In another bowl, mix flour, baking powder, and salt. Stir (or beat at low speed) about a third of the flour mixture into butter mixture. Stir in half the milk just until blended. Stir in another third of the flour mixture, then remaining milk, followed by remaining flour. Scrape batter equally into prepared cake pans and spread level.
4. Bake in preheated oven until a wooden skewer inserted in the center comes out clean, 25 to 30 minutes. Cool on racks in pans for 10 minutes, then invert cakes onto racks and remove pans. Cool completely before filling and frosting with your favorite filling and frosting recipe, or cut cake layers into wedges and dust with confectioners' sugar for a simple dessert or snack.
Soften the butter briefly in a warm place in the kitchen or in a microwave oven until very soft but not melted.
Makes 2 (9-inch) cake layers.
Date: May 14, 2007