In large bowl, beat brown sugar, eggs, pumpkin and oil with whisk until combined. In medium bowl, mix flour, cinnamon, ginger, nutmeg, baking soda, baking powder and salt until well blended. Stir flour mixture into sugar mixture until well blended. (Batter will be thick.) Stir in 1/2 cup of the nuts. Spoon and spread batter evenly into pans (about 1 1/2 cups batter in each pan).