“Bake 30 minutes” is awfully conclusory, since we don’t know how much cornbread batter is involved. I’d guess 375 or 400 degrees, regardless.
From the box of S.H. of Marshall, Missouri.
Mexican cornbread
Into plain cornbread mix, add:
One large chopped onion
2 cups grated cheese
1 can green chiles
1 can pimentos
Bacon drippings
Bake 30 minutes.
Yesterdish suggestion: Follow the instructions on the cornbread mix for time and temperature; if you’re making from scratch, try 375 or 400 deg.