Grandma Delange's Oatmeal Cookies

1 cup sugar
1/2 cup butter
1/2 cup shortening
2 eggs
1/2 cup walnuts
1/2 cup raisins(opt)
2 cups flour
3 cups oats
6 tbsp milk
2 tsp vanilla
dash salt

Mix well and form into balls. place on greased cookie sheet and bake 350 degrees until cookies look almost done then remove and cool.