Jalapeno Cornbread

1 cup buttermilk
1 cup cornmeal
1 cup all-purpose flour
3 tablespoons granulated sugar
1 teaspoon baking powder
1/2 teaspoon baking soda
2 eggs
4 tablespoons melted shortening
1 cup cream-style corn
1 cup grated Cheddar cheese
3 diced jalape