Preheat oven to 350 degrees.
Combine the flour, cornmeal, baking powder, salt and sugar in a mixing bowl.
Combine the milk and eggs and whisk to combine, add the butter, whisking.
Combine the wet and dry ingredients, stirring till all ingredients are well incorporated, stir in the jalapenos and corn.
Pour batter into a buttered or oiled loaf pan (or vessel of your choice, such as a cast iron skillet) and bake till the interior is no longer wet, about 30 minutes.