**Ingredients:**
- 1 cup cornmeal
- 1 cup all-purpose flour
- 1/4 cup sugar (optional for a slightly sweet cornbread)
- 1 tablespoon baking powder
- 1/2 teaspoon baking soda
- 1/2 teaspoon salt
- 1 cup buttermilk
- 2 large eggs
- 1/4 cup melted butter
- 1/4 cup vegetable oil
