
1 cup butter, softened
1 cup vegetable oil
1 cup brown sugar
1 cup granulated sugar
1 egg
2 teaspoons vanilla extract
3½ cups all-purpose flour
1 teaspoon salt
1 teaspoon baking soda
1 teaspoon cream of tartar
1 cup quick or old-fashioned rolled oats
1 cup flaked or shredded coconut
1 cup crisp rice cereal
1 12-ounce package (2 cups) semisweet chocolate chips