Southwestern Corn Casserole

Why This Southwestern Corn Casserole Works

In the oven, the cornmeal, flour, egg, and baking powder set up into a soft, sturdy base, kind of like cornbread. As the heat rises, the baking powder makes small bubbles inside the batter, so the casserole puffs a bit instead of baking up dense. The egg firms up and holds everything in place, so the corn and cheese stay suspended instead of sinking.

While it bakes, the buttermilk and melted butter keep the cornmeal from drying out. The corn kernels and green chilies give off a little moisture too, so the inside stays moist and tender even though the edges brown. Cheese melts into the batter and then firms up again as it cools, which adds a bit of chew and helps the slices hold together. By the time a toothpick comes out clean, the center has set, the top has turned golden, and the casserole can be cut into neat, soft squares that don’t fall apart.

Mistakes To Avoid

Overbaking this casserole dries it out fast. Once it goes past the 35-minute mark, the edges start to harden and the top can turn tough while the inside loses its soft, custardy feel, ending up crumbly instead of moist and tender.

Skipping the grease on the baking dish often leads to sticking. The cornmeal batter clings to the sides and bottom, so the crust tears when it is scooped out, leaving a broken, ragged-looking casserole with a lot of the best browned bits glued to the pan.

Overmixing the batter after the wet and dry ingredients are combined makes the casserole dense. The flour and cornmeal soak up more liquid and tighten, so instead of a light, soft crumb, the finished dish can feel heavy and slightly rubbery.

Adding the cheese too early with the dry ingredients causes clumping. The shreds get coated in flour and don’t melt into the batter as well, so the casserole bakes up with random dry cheese pockets instead of even, gooey cheese spread through each bite.