Preheat oven to 350°F.
In a large bowl, beat the egg yolks and 3/4 cup sugar together until pale and fluffy.
Mix in the vanilla and milk.
Stir in the flour, baking powder, and salt.
In a separate bowl, whip the egg whites and 1/4 cup sugar until the reach stiff peaks.
Gently fold the whites into the batter until it's all incorporated.
Spray a 9x13 pan with baking spray and pour the cake batter evenly into it.
Bake for about 30 minutes, or until the cake starts to look golden. Allow the cake to cool completely.
Poke holes all over the cake using a fork.
Mix all the milks for the milk mixture together and pour evenly over the cake. Cover and refrigerate for at least 4 hours or up to overnight.
Whip the cream, powdered sugar, and vanilla together until it's fluffy and spreadable. Spread it over the chilled cake.
And you're done! You can leave the cake plain or top it with strawberries or cinnamon.