Combine flour, baking powder, and salt in a bowl. Set aside.
Combine egg whites with 3/4 cup of sugar and mix with electric mixture until stiff peaks are formed. Add vanilla extract, mix, and set aside.
Combine egg yolks and 1/4 cup of sugar and mix with a whisk until it turns light brown.
Add egg yolk mixture to dry mixture and mix until well combined.
Fold egg white mixture into the bowl.
Add milk or water and mix until fully combined. Set aside for baking.
Butter the baking dish.
Pour mixture into baking dish and bake for 25 minutes at 350°.
Remove from oven and allow to cool.
Using a knife, cut along the edges to remove cake from dish.
Clean dish and return cake to dish.
Poke several holes all around the cake using a fork.
Combine condensed milk, evaporated milk, and whole in a pouring cup.
Slowly pour entire mixture onto the cake. Set aside.
In a bowl, combine heavy whipping cream and sugar and mix with an electric hand mixture until thick peaks form.
Top the cake with whipped cream and enjoy!