Spelt Jalapeño Cornbread (less sugar)

Name: Spelt Jalapeño Cornbread (less sugar)
Prep time: 10 min
Cook time: 20 min
Total time: 30 min
Cuisine: American
Ingredients: 115g (¾ cup) cornmeal; 75g (¼ cup + 3 tbsp) spelt flour (see note 1); 2 tsp sugar; 2 tsp baking powder; ½ tsp baking soda (bicarb); 1 tsp salt; 100ml (¼ cup + 3 tbsp) milk; 100g (¼ cup + 3 tbsp) Greek yoghurt (or sour cream); 1 egg (medium); 20g (1 tbsp + 1 tsp) butter (melted); 1 tbsp vegetable oil; 40g (1½ oz) pickled or fresh jalapeños; cheese (optional); 15g (1 tbsp) butter (for the pan)