Preheat the oven to 400. Put the first tablespoon of butter in a 9 inch or 8 inch pan and put the pan in the oven while it preheats so that the butter will melt. Set the timer for 5 minutes so you won't forget about it!
In a large bowl, mix all the dry ingredients. Make a well in the center.
To the well, add the buttermilk, melted butter, and egg. Stir those things together, then stir all together (gently) to make a smooth and thick batter.
Scrape into the buttery pan and bake at 400 for about 25 to 30 minutes. A 9 inch square pan should take 25 minutes, but an 8 inch pan will take about 32.
Let cool for about 15 to 20 minute before serving.