Preheat your oven to 350°F (175°C). Grease and flour a 9x13-inch baking dish.
In a medium bowl, whisk together 1 cup of all-purpose flour, 1½ teaspoons of baking powder, and ¼ teaspoon of salt. Set aside.
In a large bowl, beat 5 egg yolks with ¾ cup of granulated sugar on high speed until the yolks are pale yellow. Stir in ⅓ cup of whole milk and 1 teaspoon of vanilla extract.
Gently fold the flour mixture into the egg yolk mixture until just combined.
In a separate bowl, beat the 5 egg whites on high speed until soft peaks form. Gradually add the remaining ¼ cup of granulated sugar and continue beating until stiff peaks form.
Gently fold the egg whites into the batter until just combined. Pour the batter into the prepared baking dish and spread evenly.
Bake in the preheated oven for 25-30 minutes, or until a toothpick inserted into the center comes out clean. Allow the cake to cool completely in the baking dish.
In a large bowl, whisk together 1 can of evaporated milk, 1 can of sweetened condensed milk, and 1 cup of whole milk.
Once the cake has cooled, poke holes all over the top using a fork. Slowly pour the milk mixture over the cake, allowing it to soak in. Cover and refrigerate for at least 4 hours or overnight.
In a large bowl, beat 1½ cups of heavy cream, 3 tablespoons of powdered sugar, and 1 teaspoon of vanilla extract on high speed until stiff peaks form.
Spread the whipped cream evenly over the chilled cake.
Garnish with fresh strawberries or a sprinkle of cinnamon if desired. Slice and serve cold.