In large bowl, sift together flour, baking powder, cocoa, ginger, cinnamon and cloves; stir in hazelnuts. Set aside. In medium bowl, whisk together milk, egg whites and molasses. Make a well in dry ingredients and pour wet ingredients into it. Stir just enough to moisten; batter will be lumpy. Heat lightly oiled griddle or frying pan over medium high heat. Pour or scoop batter onto griddle, using approximately 1/4 cup for each pancake. Brown on both sides; serve hot.