01 -
Preheat oven to 175°C. Lightly grease a 23 x 33 cm baking dish with butter and set aside.
02 -
In a medium bowl, whisk together flour, baking powder, and salt until evenly combined. Set aside.
03 -
In a large mixing bowl, use an electric mixer to beat sugar, eggs, and vanilla extract on high speed until pale and airy, about 5 minutes.
04 -
Add half the dry ingredients to the egg mixture and blend on low speed just until incorporated. Gradually pour in milk, then add remaining dry mixture, mixing until just combined.
05 -
Pour the batter into the prepared baking dish. Bake for 25–30 minutes or until a toothpick inserted in the centre comes out clean. Remove from oven and allow to cool completely.
06 -
In a large jug or bowl, whisk together sweetened condensed milk, evaporated milk, and heavy whipping cream until fully combined.
07 -
Poke numerous holes all over the cooled sponge using a skewer or fork. Slowly pour the milk mixture evenly over the cake, ensuring it soaks into the entire surface and edges. Cover and refrigerate for at least 4 hours or overnight.
08 -
In a clean bowl, beat heavy whipping cream with powdered sugar using a hand mixer until stiff peaks form.
09 -
Evenly spread whipped topping over the chilled cake. Dust with ground cinnamon before serving, if desired.