2 slices bacon, cut crosswise into 1/4-inch slivers
1 1/2 cups buttermilk or regular milk, or more as needed
2 large eggs
3 tablespoons unsalted butter, melted, or 3 tablespoons vegetable oil
1 cup yellow or white cornmeal, preferably stone-ground
1 cup unbleached all-purpose white flour
3 tablespoons brown sugar or honey
1 1/2 teaspoons baking powder
1/2 teaspoon baking soda, or an additional 1/2 teaspoon baking powder
1 scant teaspoon table salt
2 to 4 jalapeño peppers, seeded and finely chopped
1 cup coarsely grated pepper Jack cheese (4 ounces)