• Preheat oven to 400°F (200°C) and grease a 9-inch baking dish or cast-iron skillet with butter
• In a large bowl, mix Jiffy Corn Muffin Mix, egg, milk, and cream-style corn until combined
• Stir in shredded cheddar cheese, jalapeño, green chilies, garlic powder, salt, and black pepper
• Pour batter into the prepared baking dish and smooth the top
• Bake for 20-25 minutes, or until golden brown and a toothpick inserted in the center comes out clean
• Let cool for a few minutes before slicing and serving