Step 1

Preheat the oven to 350℉. Lightly butter a 9x13 pan. Set aside.

Step 2

In a medium mixing bowl, whisk together flour, baking powder, and salt. Set aside.

Step 3

With an electric mixer, combine sugar, eggs, and vanilla on high speed until the mixture is light and airy (about 5 minutes). Add half the dry ingredients, mixing on low, until just incorporated.

Step 4

Gradually pour in the milk. Add the remaining dry ingredients and mix on low until just combined.

Step 5

Pour the cake mixture into the prepared pan and bake for 25-30 minutes or until a toothpick inserted in the center comes out clean. Remove from the oven and cool completely.

Step 6

In a large mixing bowl or liquid measuring cup, combine sweetened condensed milk, evaporated milk, and heavy whipping cream.

Step 7

Poke holes all over the top of the cooled cake.

Step 8

Slowly pour the milk mixture over the cake, letting it seep into the cake through the holes. Cover and refrigerate for at least 4 hours or overnight.

Step 9

With a hand mixer, whip the whipping cream and powdered sugar until stiff peaks form. Spread over the top of the chilled cake and sprinkle with cinnamon, if desired.