Can you improve my corn muffins?

[salvorhardin]

I'm looking for the best, most minimal, corn muffin recipe possible. Back in my early 20s I remember having a killer recipe but I never wrote it down and now it's lost to the middle ages.

So here's the recipe I'm working off. It's pretty good, but it frequently turns out too dry and the muffins tend to fall apart at a touch. How can I make it better without complicating it (yes, adding stuff like buttermilk is delish, but I want the most basic recipe possible).

1 C cornmeal
1 C flour
2 - 4 Tbsp sugar (depending on taste)
4 Tbsp baking powder
1/2 tsp salt
1 C milk
1/4 C butter, melted
1 large egg, beaten

Normal assembly. Mix dry, mix wet, mix wet into dry. Bake at 400F for 18-20 min.

Should I add an extra egg? More flour? Less baking powder? More milk?