Preheat the oven to 350º F.
To make the pumpkin cake:
Add the pumpkin cake dry ingredients to a bowl and whisk to blend.
In a second bowl, add the pumpkin cake wet ingredients and mix well.
Pour the wet ingredients over the dry ingredients and mix. (*See note)
To make the chocolate cake:
Add your dry chocolate cake ingredients to a bowl and whisk to blend.
In a second bowl, add the wet ingredients and mix.
Pour the wet ingredients into the dry ingredients and mix. (*See note)
Grease a loaf pan and add a layer of chocolate cake batter.
Add some pumpkin batter on top of the chocolate batter.
Repeat so you have a total of 4 layers.
Take a knife and insert it into the batter and swirl gently to slighly swirl the batters together.
Sprinkle chocolate chips over the top and sightly press them into the batter.
Bake the cake for 35 minutes. Remove the cake and test with a toothpick for doneness. (*See note)
Remove from the oven and cool on a baking rack.