Preheat the Oven
Preheat to 350°F (175°C). Grease and flour a 9×13-inch baking dish.
Mix Dry Ingredients
In a medium bowl, whisk together flour, baking powder, and salt.
Beat Egg Yolks
In a large bowl, beat the egg yolks with ¾ cup sugar until pale and creamy. Stir in milk and vanilla. Add the flour mixture and mix until just combined.
Beat Egg Whites
In another bowl, beat egg whites until soft peaks form. Gradually add the remaining ¼ cup sugar and beat until stiff peaks form.
Fold Batter
Gently fold the egg whites into the yolk mixture until fully combined.
Bake the Cake
Pour batter into the prepared pan and bake for 25–30 minutes, or until a toothpick comes out clean. Let cool completely.
Prepare Milk Mixture
In a measuring cup or bowl, whisk together evaporated milk, sweetened condensed milk, and heavy cream.
Soak the Cake
Poke holes all over the cooled cake with a fork. Slowly pour the milk mixture over the cake, letting it absorb. Cover and refrigerate for at least 4 hours, preferably overnight.
Make Whipped Topping
Beat heavy cream, powdered sugar, and vanilla until soft peaks form. Spread evenly over the chilled cake.
Serve
Garnish with fresh berries or a sprinkle of cinnamon. Slice and enjoy!