In a large bowl sift together cornmeal, flour, sugar, salt, baking powder and baking soda.
In a separate bowl whisk together buttermilk, eggs and jalapeno and cheese.
Pour egg mixture into cornmeal/flour mixture and stir just until combined.
Heat oil on medium high heat, using a thermometer, to 350°. Using a tablespoon drop batter, in batches into oil and fry until golden brown. Drain on paper towels and keep warm in oven until ready to serve.