01 -
Heat your oven to 350°F and get your 9x13 inch pan ready by greasing it with cooking spray and dusting with flour.
02 -
In a large bowl, whisk together the pumpkin puree, evaporated milk, pumpkin pie spice, sugar, and eggs until everything is well combined and smooth.
03 -
Pour the pumpkin mixture into your prepared pan. Sprinkle the dry cake mix evenly over the top, then arrange the thin butter slices across the surface.
04 -
Scatter the chopped pecans over everything, and add toffee bits if you're using them.
05 -
Bake for 55-60 minutes until the center is set and the top turns golden brown. Let it cool before serving to help it set properly.