Preheat oven to 425°. Brush wells of 2 (7-stick) cast-iron cornstick pans with melted butter. Place pans in oven to preheat for 5 minutes.
In a large bowl, whisk together cornmeal, flour, salt, chili powder, and cumin. In a small bowl, whisk together milk and oil. Make a well in center of dry ingredients; stir in milk mixture, jalapeño, corn, cheese, and bell pepper just until combined.
Carefully remove hot pans from oven. Divide batter among prepared wells. Bake until golden brown and crisp, about 15 minutes. Remove from pan immediately.
In a small bowl, stir together sour cream and cream. Serve cornbread with cream mixture. Garnish with green onion, if desired.
Recipe by Southern Cast Iron at https://southerncastiron.com/southwestern-cornbread-sticks/