Preheat Oven
Preheat oven to 350°F (175°C). Grease a baking dish and set aside.
Mix Egg Yolks
Beat egg yolks with ¾ cup sugar until pale and creamy. Stir in milk and vanilla.
Whip Egg Whites
In a separate bowl, beat egg whites until soft peaks form. Gradually add remaining ¼ cup sugar and beat until stiff peaks.
Combine Batter
Gently fold the egg yolk mixture into the flour mixture. Carefully fold in egg whites until just combined — do not overmix.
Bake
Pour batter into prepared pan. Bake for 25–30 minutes, until a toothpick comes out clean. Let cool completely.
Prepare Milk Mixture
Whisk condensed milk, evaporated milk, heavy cream, and whole milk together.
Soak the Cake
Poke holes all over the cooled cake using a fork. Slowly pour the milk mixture evenly over the cake. Refrigerate at least 4 hours or overnight.
Make Whipped Cream
Beat heavy cream, powdered sugar, and vanilla until stiff peaks form.
Finish & Serve
Spread whipped cream over the chilled cake. Top with dulce de leche or fresh berries if desired. Slice and enjoy.