Preheat the oven to 400℉. Whisk together the cornmeal, flour, sugar, baking powder and salt in a large glass bowl.
1 cup yellow cornmeal, 1 cup all-purpose flour, 1 tbsp granulated sugar, 2 tsp baking powder, 1/2 tsp kosher salt
Add the milk, egg and melted butter.
1 cup whole milk, 1 large egg, 4 tbsp butter
Stir it all together
Stir in the grated cheddar and optionally the sliced jalapeño.
1 cup cheddar cheese, 1 hot jalapeño
Add the batter to 9 standard sized muffin wells. Optionally add a sliver of jalapeño to mark the hot ones.
Bake for 15-20 minutes until a toothpick inserted into the middle of a muffin comes out clean. The muffins should be golden-brown.
Let the muffins cool on a rack for a few minutes before removing from the muffin pan.
Serve and enjoy!