01 -
Combine yellow cake mix, pumpkin puree, brown sugar, and pumpkin pie spice in a mixing bowl. Stir until smooth and evenly blended.
02 -
Pour batter into a greased 9x13 inch baking dish. Bake at 350°F for 20 to 25 minutes, until a toothpick inserted near the center comes out clean. Let cool for 15 minutes.
03 -
Using the handle of a wooden spoon or similar tool, gently poke holes about 1 inch apart, halfway through the cake. Avoid piercing all the way through to the bottom.
04 -
Pour sweetened condensed milk evenly over the surface so it seeps into the holes. Refrigerate for 30 minutes to allow absorption.
05 -
Evenly spread thawed whipped topping over the cooled cake surface to cover completely.
06 -
Sprinkle chopped toffee bits over the whipped topping. Drizzle caramel sauce evenly on top.
07 -
Refrigerate the cake for at least 3 hours. For optimal flavor and texture, chill overnight before serving.