Preheat your oven to 400°F. Spray a 7x5” or pie dish with nonstick cooking spray and set it to the side. 

Use a large mixing bowl and add the cornbread mix, egg, milk, butter, and sugar. Mix everything together with a spoon or a whisk until it is all fully incorporated. 

Now add the diced jalapenos and the shredded cheese into the cornbread batter. Use a spoon or spatula to gently fold it into the batter. 

Pour the cornbread batter into the baking dish and use a spatula to smooth it out into one even layer. Place the dish in the oven and bake for 20 minutes. 

The top should be golden brown, and the center should be cooked all the way through. You can insert a toothpick into the middle of the cornbread, if it comes out clean (dry), the cornbread is done. 

You can add a pad of butter over the top of the cornbread to melt for additional flavor and moisture. Let it cool for at least 5 minutes, cut it into pieces, and enjoy!