Spoon into an 11 x 8 x 2 ungreased baking dish; smooth the top of the mixture with the back of a spoon, cover with foil and place on the middle oven rack; bake at 375°F for 50-60 minutes
Test for doneness by inserting a clean toothpick into the center; when the toothpick comes out clean, it's done; if you want a semi-crispy top, remove the foil and continue to cook 10-15 minutes
Notes
Water Bath and Size of Baking DishesThe recipe as written yields about 8 - 10 cups. Keep this in mind when you're selecting a baking dish. You'll need two baking dishes - one for the corn casserole and one for the water/steam bath.
The texture of this corn dish is soft and creamy because it is covered with foil and primarily cooked by steam
If you want a firmer texture, cook it with foil until the center is somewhat firm, remove the foil and continue to bake uncovered until the top is as crispy and golden brown as you like.
CornUse frozen, canned (drained) or fresh corn. If you use frozen, make sure it's thawed first. Pulse half of the total amount of corn in the food processor and leave the remaining half as whole kernels.Hand mixing versus Electric mixerHand mixing works best when you combine the pureed corn mixture with the masa flour and butter. If you use an electric mixer, the batter gets grainy. If you combine by hand with a spatula or wooden spoon, the mixture creams together and this is what you want. A creamy mixture of ingredients in the smaller baking dish.Oven Temperatures VarySince oven temperatures vary, the actual baking time might be longer.