Step 1 : Preheat oven to 350 degrees Fahrenheit.

Step 2 : Butter a 8"x8" baking pan.

Step 3 : Cream the sugars and butter in a large mixing bowl.

Step 4 : Add the eggs one at a time, beating well after each addition.

Step 5 : In a medium-sized bowl, stir together the sweet potato, apple, pear, milk, vanilla, cinnamon, nutmeg and cloves.

Step 6 : In another bowl, combine the flour, baking powder, baking soda and salt.

Step 7 : Add the sweet potato mixture to the creamed mixture and stir until combined.

Step 8 : Add the dry ingredients, stirring just until the flour mixture disappears into the batter.

Step 9 : Fold in the nuts.

Step 10 : Spread batter into the prepared pan and bake for approximately 55 minutes or until a toothpick inserted into the center comes out clean.

Step 11 : Once cool, frost with "Cinnamon Cream Cheese Frosting."