My Easy Tres Leches Cake recipe is engineered to be light-as-air and the best it possibly can.
Preheat the oven to 350°F (180°C) then grease a 9x13 inch cake pan.
In a medium bowl combine flour, baking powder, and salt. Set aside.
Separate the eggs yolk and whites into two separate bowls.
Using a stand mixer or electric hand mixer whisk the egg yolks on high speed. Slowly stream in 3/4 cup sugar to the bowl with the egg yolks. Whip until thick and pale in color.
Continue whipping and add the 1/3 cup milk and vanilla.
Next, add in the dry ingredients and gently mix until just combined. Don't over-mix as it can toughen the cake. Transfer mix to a clean bowl and wash out the mixing bowl.
Back on the stand mixer, fitted with a whisk, beat the egg whites on high speed until light and foamy. Gradually add the remaining 1/4 cup of sugar as you mix and continue beating until stiff peaks.
Remove from the mixer and gently fold the egg whites into the egg yolk batter until just combined.
Pour the batter into the prepared baking pan. Bake for 35 to 40 minutes, or until a toothpick inserted in the center of the cake comes out clean. Remove from the oven and set aside.
Once the cake has cooled slightly use a toothpick to poke holes all over the top of the cake. Slowly pour the milk mixture over the top of the cake, making sure to pour near the edges and all around. I do this in two stages until it's all soaked up.
Refrigerate the cake for at least 1 hour but preferably overnight to allow it to soak up the milk.
When ready to serve, whip the heavy cream to stiff peaks. Smooth the whipped cream over the top of the cake. Sprinkle cinnamon on top and enjoy!