Preheat the oven to 400 degrees F. Spray miniature muffin tins with vegetable oil cooking spray.
In a small mixing bowl, combine the cornmeal, salt and baking powder, stirring with a metal spoon. Add the cheese, corn, sour cream, and chiles. Stir until lightly combined. Add the oil and eggs and stir until everything is just combined; do not over mix. The batter will be very stiff.
Place about 1/2 tablespoon of batter into each muffin cup. Bake for 18 to 20 minutes. Serve warm.