Tres Leches Cake

Instructions

1. Prepare the oven and pan
   Preheat oven to 350°F (175°C). Grease a 9x13 inch baking pan with butter or cooking spray, then line with parchment paper.
2. Mix dry ingredients
   In a medium bowl, whisk together flour, baking powder, and salt until well combined. Set aside.
3. Beat egg whites
   In a large bowl, beat egg whites with an electric mixer on medium speed until frothy. Gradually increase to high speed and slowly add 1/2 cup sugar, continuing to beat until stiff peaks form.
4. Make egg yolk mixture
   In a separate bowl, beat egg yolks with the remaining 1/2 cup sugar until pale yellow and doubled in volume, about 2 minutes. Mix in vanilla extract and 1/3 cup milk.
5. Combine and bake
   Gently fold the flour mixture into the egg yolk mixture. Then carefully fold in the egg whites, one-third at a time, until just combined. Do not overmix. Pour batter into the prepared pan and smooth the top. Bake for 25-30 minutes, until a toothpick inserted in the center comes out clean.
6. Prepare milk mixture
   While the cake is baking, whisk together the sweetened condensed milk, evaporated milk, and 1/4 cup of heavy cream in a bowl. Set aside.
7. Soak the cake
   Allow the cake to cool in the pan for 10 minutes. Then use a fork to poke holes all over the cake. Slowly pour the milk mixture over the cake, allowing it to soak in completely. Cover with plastic wrap and refrigerate for at least 4 hours or overnight.
8. Add the topping
   Before serving, beat the remaining heavy cream with powdered sugar and 1/2 teaspoon vanilla until stiff peaks form. Spread whipped cream over the cake, sprinkle with cinnamon, and garnish with fresh berries if desired.