1. Combine first 6 ingredients in a large bowl; make a well in center of mixture.
2. Whisk together buttermilk, oil, and eggs; add to dry mixture, stirring just until moistened. Gently fold in grated orange rind, marmalade, and cranberries. Spoon into a lightly greased 8 1/2- x 4 1/2-inch loaf pan.
3. Bake at 375° for 28 to 32 minutes or until a wooden pick inserted in center comes out clean. Cool in pan on wire rack 5 minutes. Remove from pan to wire rack, and let cool 20 minutes or until completely cool.
Note: For testing purposes only, we used Post Grape-Nuts cereal.
Cranberry-Orange Muffins: Prepare recipe as directed through Step 2, spooning batter into a lightly greased muffin pan, filling two-thirds full. Bake at 375° for 16 to 18 minutes or until golden brown. Cool in pan on wire rack 5 minutes; remove from pan to wire rack, and cool 10 minutes or until completely cool.