These festive low-fat biscotti are another twist on Julie Van Rosendaal's low-fat biscotti recipe. With only two tablespoons of butter for the entire recipe, you can enjoy your favorite treats this holiday without feeling guilty. Don't forget to divide the dough into two separate loaves or the cookies won't cook evenly. Also, the dough may be more crumbly than traditional biscotti dough. Just use your hands to work it into a log, but be careful not to compact the dough too much. These can be made year round by replacing the colored sugars with white sugar and using plain white chocolate chips. Also try adding peppermint candies and peppermint extract in place of the white chocolate and vanilla respectively. ENJOY!