If you are using a box cornbread mix, check the box to see what other ingredients are needed to make the corn bread. The brand that I bought asked for 1 egg, 1/2 cup of oil, and 3/4 cup of milk. If your cornbread mix does not ask for oil, do not add any. Instead of 3/4 cup milk, I used 1/2 cup sour cream and 1/4 cup water plus a little extra water to get the right consistency. It ended up being about 1/3 cup of water.
Add all of your ingredients for your bread in a big bowl and mix. Once it is fully combined, add it to a greased 8x8 baking dish.
Bake at 350F (or the temperature it says on your cornbread mix) for 30-35 minutes. Or until the edges are brown and you are able to poke a toothpick in the middle and it comes out dry.
While it is baking, make your topping. Combine sour cream, mayo, tajin, and garlic powder in a small bowl. Add to a squirt bottle if you have one so that you can drizzle it on top once the cornbread cools slightly.
Once the cornbread is done baking, remove it from the oven and let it cool for 30 minutes.
Garnish the cornbread with chopped cilantro, cotija cheese, creamy sauce, and additional tajin.