1Preheat the oven to 375 degrees F (190 degrees C).
2In a large mixing bowl, cream butter and sugars until fluffy. Beat in the eggs and squash. Sift together the flour, baking soda, baking powder, and spices; add to mixture, stirring until well blended. Stir in raisins and nuts. Spoon onto cookie sheets spacing cookies 2 inches apart.
3Bake for 10 to 12 minutes in the preheated oven, until edges are golden.