Heat oven to 350° F (175° C). Grease and flour a Nordic Ware Bundt® pan; set aside.

In large bowl, beat butter and sugar until creamy. Add egg and egg whites; mix until well blended. Add flour, baking powder, baking soda, salt, cinnamon, nutmeg, pumpkin and ½ cup water; mix on low speed until blended, scraping bowl often. Increase speed to medium and beat 2 minutes.

Remove ¾ cup of the batter and put in a small bowl. Spoon remaining batter into prepared pan.

To reserved batter, add cocoa and 1 tablespoon water; stir to combine. Place spoonfuls of chocolate batter on top of batter in pan. Using a knife, swirl chocolate batter into pumpkin batter to marble. Bake 40-47 minutes, until toothpick inserted comes out clean. Cool 10 minutes in pan; remove from pan and cool complete.