Old Fashioned Chocolate Zucchini Cake

Preheat oven to 325 degrees Fahrenheit. Prepare a 9x13'' baking dish with cooking spray or line with parchment paper. Set aside.
In a medium bowl, sift together the dry ingredients. Set aside.
In a large mixing bowl, add the sugar, butter and oil. Beat until blended well. Add the eggs, one at a time, beating well after each one. Add in vanilla extract and mix to combine. You can use an electric mixer or stand mixer with the paddle attachment on low speed.
Slowly add in the dry ingredients and buttermilk in three rounds, mixing between each round.
Fold in the shredded zucchini and 1 cup of the chocolate chips.
Spoon the batter into the prepared pan, and spread evenly with a spatula. Sprinkle the remaining 1/2 cup of chocolate chips on top of the batter.
Bake for about 45 minutes, or until a toothpick inserted in the center comes out clean.
Remove from the oven and allow to cool completely before serving.