Melt 1/2 cup of butter and pour it into the bottom of a 9x13 baking dish.
Evenly sprinkle dry cake mix over the butter.
Sprinkle dry pudding mix over the cake mix.
With a fork, try to spread out the milk so that the dry cake mix and pudding are all a little bit moistened. You don't need to fully mix it, but rake the fork through so all the dry ingredients get wet.
Top with chocolate chips, then mint baking chips.
Lay the butter pats evenly across the top.
Bake for about 50-60 minutes.
Top with vanilla ice cream or whipped cream plus extra peppermint baking chips as a garnish.
If there are any dry cake mix areas when you take it out of the oven, you can spritz a little bit of water from a clean spray bottle on it to make it blend in with the rest of the crust.
It is important to follow the steps of this video as doing it in another order can make it come out gummy.
If you want to make this more holiday-themed, garnish with crushed candy canes instead of mint pieces.
This isn't a "pretty" cake to look at so you can top it with whipped cream or vanilla ice cream to change the look.
Store any leftover dessert covered, in the fridge for up to 3 days.