Preheat the Oven: Preheat your oven to 350°F (175°C) to ensure it’s ready for baking.
Prepare the Baking Dish: Lightly grease a 9x13-inch baking dish with butter or cooking spray.
Layer the Strawberry Filling: Spread the strawberry pie filling evenly over the bottom of the prepared baking dish.
Make the Cheesecake Mixture: In a medium bowl, mix the softened cream cheese, egg, and granulated sugar until smooth. Dollop the mixture over the strawberry filling and spread gently to cover.
Add the Cake Mix: Sprinkle the vanilla cake mix evenly over the cheesecake layer, ensuring the entire surface is covered.
Top with Butter: Distribute the sliced cold butter evenly over the cake mix. The butter will melt during baking to create a golden, crispy topping.
Bake: Place the baking dish in the oven and bake for 40-45 minutes, or until the top is golden brown and the edges are bubbling.
Cool and Serve: Let the cake cool for about 15 minutes. Garnish with fresh strawberries if desired, and serve warm or at room temperature.