In a bowl combine cornmeal, baking soda, salt, and sugar. In another bowl whisk together egg, buttermilk, and oil. Stir into the flour mixture along with the corn, jalapeno, and cilantro.
Coat a griddle or heavy skillet with vegetable cooking spray and place over moderately high heat. Pour about 1/4 cup batter onto hot griddle, forming a 4 to 5-inch round. Turn cakes when bubbles form on the top and the bottoms are golden. Continue to cook on the second side until cooked through, another 3 or 4 minutes. Keep cakes covered in a warm oven on the lowest setting until ready to serve (u