Prepare the peaches. Open all three cans of peaches. Pour two full cans of peaches into a baking dish along with only the peaches from the third can. Use a knife to coarsely chop the peach slices into bite-sized pieces.
Mix in the spices. Mix the cornstarch, nutmeg, and ground cinnamon into the baking dish full of chopped peaches.
Cover with cake mix. Evenly spread the dry cake mix over the top of the seasoned peaches.
Sprinkle on the brown sugar. Sprinkle the brown sugar over the dry cake mix.
Top with butter. Slice the stick of butter into 25 pieces. It doesn't have to be exact, just enough butter to evenly distribute over the top of the cobbler.
Bake and enjoy! Place the prepared peach cobbler into an oven preheated to 325F and bake for 45-50 minutes or until the cake mix crust is baked through. Serve and enjoy!
