Pella — 4 cups all-purpose flour
1 teaspoon cream of tartar
1 teaspoon baking soda
1/2 teaspoon salt
1 cup (2 sticks) butter, softened
1 cup powdered sugar
1 1/2 cups granulated sugar
1 cup canola oil
1 teaspoon vanilla extract
1. Sift together flour, cream of tartar, baking soda and salt.
2. Combine butter, powdered sugar and 1 cup granulated sugar in a large bowl. Beat with an electric mixer. Add oil, eggs and vanilla, mixing to combine. Gradually add flour mixture. Chill dough 3 to 4 hours until firm.
3. Preheat oven to 350F.
4. Shape dough into walnut-size balls and roll in remaining 1/2 cup granulated sugar. Place cookies on an ungreased baking sheet. Dip the bottom of a glass in granulated sugar and press onto each ball to flatten.
5. Bake 12 minutes or until lightly browned. Remove cookies from pan and let cool on paper towels.
Makes 3 dozen.