Step 1

Preheat the oven to 350°F and prepare a 9x13 pan by spraying it with cooking spray.

Step 2

In a medium bowl, mix the cake mix, 4 eggs, melted butter, and one cup of milk.

Step 3

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

Step 4

While the cake is baking, combine the remaining 1 cup of milk, evaporated milk, and sweetened condensed milk in a medium bowl. Place it in the refrigerator until needed.

Step 5

In a small bowl, mix together the strawberry jam and 1 cup of the sliced strawberries. Set aside.

Step 6

Let the cake cool completely before poking the cake all over with a fork. Pour the milk mixture over the cooled cake, then spread the cake with the jam mixture, then the Cool Whip.

Step 7

Top the cake with the remaining sliced strawberries, then cover and refrigerate for at least 1 hour.

Step 8

Slice into 12 squares and serve immediately. Any leftover cake should be stored in the refrigerator.