Preheat oven to 350°F; grease a 9x13-inch white ceramic baking dish.
Whisk flour, baking powder, and salt. Beat egg yolks with 3/4 cup sugar; add milk, vanilla, and dry ingredients. Beat egg whites with 1/4 cup sugar; fold into batter.
Pour into dish; bake 20-25 min. Cool completely.
Whisk condensed milk, evaporated milk, cream, and vanilla. Taste and adjust the sweetness or flavor. Poke holes in the cake; pour milk mixture over. Chill 4 hours.
Beat cream, powdered sugar, and vanilla for topping; spread over cake.
Garnish with berries and cinnamon. Serve on a white ceramic platter with coffee.
Notes
Chill the cake for proper soaking.
Store in the fridge for 3 days or freeze the unsoaked cake for 2 months.