Add the flour, yeast, sugar, salt, and baking soda to a large mixing bowl. Whisk everything together until evenly combined.
5 cups all purpose flour, 2 .25 oz pkts active dry yeast, 1 tbsp granulated sugar, 2 tsp salt, 1/4 tsp baking soda
Pour the milk and water into the mixing bowl then beat on low speed for 30 seconds. Scrape down the sides, then slowly increase the speed to high and beat for 3 minutes. The batter should be stiff, but don't knead it.
2 cups warm whole milk, 1/2 cup warm water
Grease two 9x5" metal loaf pans thoroughly with butter and sprinkle cornmeal in the bottom of both.
yellow cornmeal
Spoon the batter into the prepared loaf pans, dividing it as evenly in half as possible. Sprinkle some additional cornmeal on top of both loaves.
Cover the pans with two clean dish cloths and let the dough rise in a warm place, roughly 45 minutes to an 1 hour.
Uncover and bake at 375° for 35 minutes, just until the loaves have cooked through and are golden brown on top.
Carefully remove the loaf pans from the oven. Run a butterknife around the edges to release the loaves, then transfer them to a wire rack to cool completely.
Slice, toast, and serve!