Ultimate Sourdough Cornbread Muffins

all purpose or bread flour (I have used both & cannot tell the difference)

sugar

brown sugar

cornmeal

baking powder

salt

sourdough starter

milk

eggs (I use frozen or powdered eggs & it works just as well as fresh eggs. The photos below have frozen eggs.)

vegetable oil or melted & cooled butter (I prefer butter, but veggie oil is fine too)