Preheat oven to 350°F (175°C). Grease and flour a 9x13 inch baking dish.
In a large bowl, whisk together flour, baking powder, and salt. Set aside.
In another bowl, beat egg yolks with ¾ cup sugar until pale and fluffy. Stir in milk and vanilla. Pour egg yolk mixture into the flour mixture and mix until combined.
In a separate bowl, beat egg whites until soft peaks form. Gradually add remaining ¼ cup sugar and beat until stiff peaks form. Gently fold egg whites into the batter.
Pour batter into the prepared baking dish. Bake for 30 minutes or until a toothpick inserted into the center comes out clean. Let cake cool completely.
In a small bowl, whisk together evaporated milk, sweetened condensed milk, and whole milk. Poke holes all over the cooled cake using a fork. Slowly pour the milk mixture over the cake, allowing it to soak in. Refrigerate for at least 4 hours or overnight.
To make the whipped cream topping, beat heavy cream, sugar, and vanilla until stiff peaks form. Spread over the chilled cake. Serve and enjoy!