Preheat the oven to 400 degrees. Prepare either a muffin tin with liners, 9-10” cast iron skillet, or a 9” x 9” square baking pan.
In a large mixing bowl, measure out the cornmeal, all-purpose flour, baking powder, sea salt, and granulated sugar. Mix until combined and set aside the flour mixture.
In a small bowl, measure out the whole milk. honey, butter, eggs, and sourdough starter. Mix really well until fully combined.
Add the wet ingredients to the dry ingredients and mix until JUST combined. Do not overmix.
Next, depending on what pan you plan to use divide or dump the cornbread batter into the pan or muffin liners. Fill ¾ of the way for muffins.
NOTE: If using a cast iron pan, prepare the skillet by heating on medium heat on the stove top once heated add 1-2 T butter. When the pan is warm and the butter bubbly add the batter into the hot skillet.
Bake in the preheated oven until it springs back when gently touched and starts to turn golden brown. For best results be careful not to overbake the cornbread.