Heat oven to 350F. Beat butter, cream cheese and sugar in large bowl with mixer until well blended.
Add eggs, 1 at a time, mixing well after each addition. Blend in pumpkin. Gradually add combined dry ingredients, mixing after each addition just until moistened. Stir in nuts.
Pour into 2 greased and floured 9x5-inch loaf pans.
Bake 55 min.or until toothpick inserted in centers comes out clean. Cool 5 min.; remove from pans to wire racks. Cool completely.