To make Martha Stewart’s cornbread, you need to mix together 1 cup of yellow cornmeal, 1 cup of all-purpose flour, ¼ cup of sugar, 1 tablespoon of baking powder, 1 teaspoon of salt, and 1 cup of milk. In a separate bowl, whisk together 2 large eggs and 4 tablespoons of unsalted butter until the mixture is smooth and creamy. Then, add the dry ingredients to the wet ingredients, and mix until the batter is evenly combined. Pour the batter into a greased 9-inch square baking pan, and bake for 20-25 minutes at 425°F until the top is golden brown and a toothpick inserted into the center comes out clean. Serve immediately.