Preheat the oven to 350°F (175°C) and grease a 9x13-inch baking dish.
In a medium bowl, whisk together the flour, baking powder, and salt.
In a large bowl, use an electric mixer to beat the egg yolks with 3/4 cup sugar until light and fluffy. Stir in the milk and vanilla.
Gently fold the flour mixture into the egg yolk mixture until well combined.
In a separate large bowl, use clean beaters to beat the egg whites until soft peaks form. Gradually add the remaining 1/4 cup sugar and continue beating until stiff peaks form.
Gently fold the egg whites into the batter, in three additions, until just combined.
Pour the batter into the prepared baking dish and smooth the top. Bake for 25-30 minutes, or until a toothpick inserted into the center of the cake comes out clean.
Allow the cake to cool completely in the baking dish.
In a medium bowl, whisk together the evaporated milk, sweetened condensed milk, and heavy cream.
Once the cake has cooled, pierce the surface with a fork all over. Pour the milk mixture evenly over the cake. Refrigerate for at least 4 hours or overnight.
Serve chilled, topped with whipped cream or fruits if desired.