Preheat oven to 350 degrees. Lightly grease a 9x5 inch loaf pan.
In a large bowl mix together the sugar, eggs, oil, dark brown sugar, pumpkin, spices and vanilla.
Add the baking mix and stir to combine
Mix in the chocolate chunks.
Spoon the batter into the prepared pan. Allow it to rest for 10 to 15 minutes before baking.
Bake for 55 minutes or until cake tester comes out clean or top springs back to touch. Remove from the oven. Let cool completely before turning out of the pan. Serve with jam for breakfast or as a delicious dessert!