3 tablespoons canola oil 3 cups blue cornmeal 2 tablespoons baking powder ½ teaspoons baking soda 1 cup buttermilk 1 cup sour cream (or a second cup of buttermilk) ½ cup milk 2 eggs 1 teaspoon salt 3 tablespoons raw agave nectar ½ cup lightly toasted pine nuts (optional)