Easy Corn Bread (Gluten Free)

From the back of the Quaker cornmeal package.

2 1/2 c all purpose flour (I used 1 c brown rice flour, 1 1/2 c white rice flour + 1 t xanthan gum)
1 1/2 c cornmeal
1/2 c sugar
4 teaspoons baking powder
1 teaspoon salt (optional, but I did put it in)
2 c milk
1/2 c vegetable oil
2 eggs
3 T butter (optional)

Heat oven to 400.
Grease a 9x13 pan (I melted butter in the pan, so no need to grease)
Combine dry ingredients, stir in the milk oil and eggs.
If desired, melt the 3 T butter in the the pan, then place the mixture in the prepared pan.
Bake 20-25 minutes or until light golden brown.