In large bowl whisk milk with pudding mix. Add in cake mix and butterscotch morsels.
Pour batter into a greased 13x9 baking dish. Bake according to cake mix (for a 13x9 cake), adding about 10 extra minutes to the cook time. Remove from oven and cool completely.
Refrigerate 2 hours or until serving. Frost with cool whip and enjoy!
Notes
Garnish: To add even more butterscotch taste, sprinkle the top of the cake with more butterscotch morsels before serving.
Cool whip: I used regular original cool whip topping for this. You can also make homemade whipped cream if you prefer.
How to store pudding cake: Keep this cake covered in the fridge until you're ready to serve. I like this cake cold best. It stays moist and delicious for several days in the fridge--but in my house it always disappears long before then!
How long to bake pudding cake: I baked this cake at 350 degrees for about 40 minutes, which is about ten minutes longer than the box mix requires. Some cake mixes vary, so follow the instructions on the box for best results.
Don't overbake: Like I mentioned before, this cake will be very moist and a bit ooey gooey when it's ready to come out of the oven. Cooling and refrigerating the cake helps it solidify a bit more without drying out or becoming tough.