Heat oven to 350°F. Spray bottom only of 9x5-inch loaf pan with cooking spray. Reserve 1/2 cup of the cereal. Place remaining cereal in 1-gallon resealable food-storage plastic bag; seal bag. Crush cereal with rolling pin; set aside.
In large bowl, beat sugar and oil with electric mixer on medium speed until mixed. Beat in buttermilk and egg until just blended; stir in apples. Stir in crushed cereal and all remaining ingredients except reserved cereal until well mixed; spread in pan. Sprinkle with reserved cereal; lightly press into batter.
Bake 1 hour 10 minutes or until toothpick inserted in center comes out clean. Cool 10 minutes. Remove from pan to cooling rack. Cool completely, about 2 hours. Wrap tightly and store at room temperature up to 4 days or refrigerate up to 10 days.