Chocolate Pumpkin Cake with Pumpkin Buttercream Frosting

Cake portion:
1 box chocolate cake mix
1 small box chocolate instant pudding
1/2 cup whole milk
4 large eggs
1/2 cup vegetable oil
1/2 cup sour cream
15 oz. canned pumpkin (separate 2 Tbsp. out for frosting)
2 cups semi-sweet chocolate chips

Pumpkin Buttercream Frosting portion:
1 cup or 2 sticks butter, softened
2 Tbsp. pumpkin
1/4 ground cinnamon
4-5 cups powdered sugar
2-4 Tbsp. milk

Cake:
Heat oven to 350 degrees F.  Grease 2 9x5in. loaf pans.  In a mixer combine all cake ingredients except for chocolate chips.  Mix on medium speed until smooth.  Add chocolate chips and mix on low until completely mixed in.  Pour into loaf pans evenly.  Place in the oven and bake for 55-65 minutes or until toothpick comes out clean.

Frosting:
In a mixer mix butter, pumpkin and cinnamon on medium speed.  Gradually add powdered sugar and milk.  Mix until smooth.

Cool cakes for about 10 minutes, remove from the pans and place on a cooling rack.  Once cakes are cool frost and serve.C