I was wondering what to do with the last cup of pumpkin puree that wouldn't fit into my freezer container, and a voice in my head said 'put it in cornbread!' I must have a Muse because this is better than my cornbread has ever been. If your pumpkin is on the wet side, reduce the buttermilk a bit. It's a good idea to let the batter sit 10 to 20 minutes before baking to soften the cornmeal. This can also be baked in a greased cake pan (9-inch square) at 400 degrees F.