Heat oven to 400 degrees. In a large bowl stir together all ingredients, except margarine, pumpkin , buttermilk and eggs. In a medium bowl stir together remaining ingredients. Add to flour mixture: stir just until moistened. Spoon batter into greased 12 cup muffin pan. Bake for 15 to 20 minutes or until lightly browned. Let stand for 5 minutes; remove from pan.
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