Favorite Tres Leches Cake Recipe

Preheat oven to 350 °. In a large bowl, beat eggs for 3 minutes. Gradually add sugar and vanilla; beat for 2 minutes or until mixture becomes thick and lemon-colored. Combine flour and baking powder; fold into egg mixture. Spread batter into a greased 13x9-in. baking dish. Bake 20-25 minutes or until golden brown. Place on a wire rack. Poke holes in cake with a skewer, about 1/2 in. apart. In a small saucepan, bring the three milks to a boil over medium-low heat. Remove from heat; gradually stir a small amount of hot mixture into egg yolks. Return all to pan, stirring constantly. Stir in rum if desired. Bring to a gentle boil; cook and stir 2 minutes. Slowly pour milk mixture over cake, allowing mixture to absorb into cake. Let stand 30 minutes. Cover and refrigerate for 8 hours or overnight. In a large heavy saucepan, combine frosting ingredients over low heat. With a hand mixer, beat on low speed 1 minute. Continue beating on low over low heat until frosting reaches 160 °, about 14-18 minutes. Pour into a large bowl; beat on high until stiff peaks form, about 7 minutes. Spread over cake. Store in the refrigerator.