Preheat the oven to 350°F (175°C). Grease and flour a 9x13 inch baking dish.

In a mixing bowl, combine flour, sugar, baking powder, and salt.

In another bowl, whisk together milk, melted butter, eggs, and vanilla extract.

Pour the wet ingredients into the dry ingredients and mix until just combined.

Pour the batter into the prepared baking dish and bake for 30 minutes or until a toothpick comes out clean.

In a bowl, whisk together sweetened condensed milk, evaporated milk, and whole milk.

Once the cake is done, let it cool for 10 minutes. Poke holes all over the cake with a fork.

Slowly pour the tres leches mixture over the cake, allowing it to soak in.

Cover and refrigerate for at least 2 hours or overnight.

In a mixing bowl, whip the heavy cream with powdered sugar and vanilla extract until soft peaks form.

Spread the whipped cream over the chilled cake and top with sliced strawberries.