Tres Leches Cake with Dulce de Leche

Step 1
Preheat oven to 350 degrees F (175 degrees C). Grease a 9×13-inch baking pan and dust with flour.

Step 2
Beat egg whites in a glass, metal, or ceramic bowl until foamy. Add 1/4 cup sugar gradually, continuing to beat until stiff peaks form and sugar is completely dissolved.

Step 3
Beat egg yolks in a separate bowl until creamy. Add remaining 1/4 cup sugar and continue beating until pale yellow and creamy. Fold into egg whites.

Step 4
Mix flour and baking powder in a bowl. Fold in egg mixture; add lime zest. Pour mixture into the prepared baking pan.

Step 5
Bake in the preheated oven until lightly golden, about 30 minutes. Turn off oven and keep the cake in the oven for another 15 minutes.

Step 6
Mix condensed milk, evaporated milk, and heavy cream in a bowl until well combined.

Step 7
Poke cake several times across the top with a fork. Pour three-milks mixture over cake. Refrigerate for 1 hour to allow milk mixture to soak in. Spread dulce de leche on top.