Step 1: Prepare the yellow cake mix according to package directions in a 9x13 inch baking pan. Allow the cake to cool completely on a wire rack. Once cooled, use the handle of a wooden spoon or a fork to poke holes all over the cake.
Step 2: In a large bowl, beat the softened cream cheese with an electric mixer until smooth and fluffy. Gradually add the powdered sugar and continue beating until well combined. Gently fold in half of the thawed whipped topping until no streaks remain.
Step 3: Spread the cream cheese mixture evenly over the top of the poked cake base, ensuring it gets into some of the holes.
Step 4: In a separate medium bowl, whisk together the instant vanilla pudding mixes with the cold milk for approximately 2 minutes, or until the mixture begins to thicken. Make sure to whisk thoroughly to prevent lumps.
Step 5: Carefully pour the thickened vanilla pudding mixture over the cream cheese layer, gently spreading it to form an even layer.
Step 6: Spread the remaining half of the thawed whipped topping over the vanilla pudding layer, covering the entire surface of the Heaven on Earth Cake.
Step 7: Cover the pan loosely with plastic wrap and refrigerate for at least 4 hours, or preferably overnight, to allow the Heaven on Earth Cake to set completely and for the flavors to meld beautifully. This chilling time is crucial for the layers to firm up.
Step 8: Cut into squares and serve your delightful Heaven on Earth Cake chilled. Garnish with fresh berries, chocolate shavings, or a sprinkle of toasted coconut if desired.