Step 1

Preheat your oven to 350°F (180°C). Grease a 9x13-inch baking dish with nonstick cooking spray.

Step 2

In a large bowl, whisk together the pumpkin puree, evaporated milk, sugar, eggs, and pumpkin pie spice until smooth and well combined.

Step 3

Pour the pumpkin mixture into the prepared baking dish, spreading it out evenly.

Step 4

Sprinkle the dry spice cake mix evenly over the pumpkin mixture.

Step 5

Dot the top of the cake mix with the butter tabs, distributing them across the surface.

Step 6

Sprinkle the chocolate chips over the top.

Step 7

Bake for about 1 hour, or until the cake is set and the top is golden brown.

Step 8

Let the cake cool slightly before serving. Serve warm or at room temperature.