Preheat oven to 350°F and prepare a 9x13 pan with non-stick spray.
Sift together cornmeal, cake mix, baking powder, and salt in a large bowl.
Combine buttermilk, oil, eggs, brown sugar, and honey in a bowl and mix well. Add to the cornmeal mixture and mix gently. You will want all ingredients fully incorporated, but do not want to over mix.
Pour batter into 9x13 baking dish. Bake for 25-30 minutes and then check to see if the top is browning. If it is already very golden brown, you may want to cover with foil for the next 5-10 minutes. Keep a close eye on cornbread though, you do not want it to get overdone and dry. You may not need the addition baking minutes depending on your oven.