Preheat oven to 350°. Coat three 8x4-in. loaf pans with cooking spray. In a large bowl, beat butter and brown sugar until crumbly, about 2 minutes. Add egg whites, eggs, coffee, yogurt, oil and extracts until blended.
In another bowl, whisk flour, cocoa, baking soda and salt; add to brown sugar mixture alternately with buttermilk, beating well after each addition. Fold in chocolate chips.
Transfer to prepared pans. Bake 50-55 minutes or until a toothpick inserted in center comes out clean. Cool 10 minutes before removing from pans to wire racks to cool completely.
Drizzle melted white baking chocolate over loaves. Sprinkle with crushed candies. Yield: 3 loaves (12 slices each).