Mix wet ingredients together. Eggs, buttermilk and butter in a bowl. Set aside.
Mix dry ingredients together. Cornmeal, flour, baking powder, baking soda, salt and sugar in a bowl.
Add wet ingredients to dry ingredients and mix well.
Spray a round Bundt pan with cooking oil.
Pour batter into pan and cover with foil. Make a hole in the center of the foil for steam to release.
Carefully place the baking pan into the inner pot.
Select BAKE – custom – none. 350°F for 60 minutes.
When cooking time is complete, carefully remove the pan from the pot, remove the foil and let sit for 5 minutes.
Place a plate on top of the pan. Carefully flip the pan over onto the plate and remove the pan. Use oven mitts or towels for safety when flipping the pan.