Ingredients

  • 2 sticks unsalted butter, softened, plus more for greasing glass
  • 1 cup canola or vegetable oil
  • 1 cup granulated sugar, plus more for dipping
  • 1 cup powdered sugar
  • 1 teaspoon vanilla extract
  • 2 large eggs
  • 4 cups plus 2 tablespoons all-purpose flour
  • 1 teaspoon baking soda
  • 1 teaspoon cream of tartar
  • 1 teaspoon salt
  • Blue sanding sugar, for sprinkling (about 1/2 teaspoon per cookie)
  • Purple sanding sugar, for sprinkling (about 1/2 teaspoon per cookie)

Method

  • Preheat the oven to 350 degrees F.
  • In a large mixing bowl, cream together the butter, oil, granulated sugar, powdered sugar, vanilla and eggs.
  • Add the flour, baking soda, cream of tartar and salt and mix well.
  • Cover and refrigerate the dough for 1 hour.
  • Using a cookie scoop, drop balls of dough onto ungreased, unlined baking sheets.
  • Smear a dab of butter all over the bottom of a glass, then dip the glass in granulated sugar.
  • Use the glass to flatten each ball of dough, dipping again into the sugar each time.
  • Then sprinkle blue sanding sugar (about 1/2 teaspoon per cookie) over half of the cookies, and purple sanding sugar over the other half.
  • Bake until the cookies are just barely turning brown, 9 to 11 minutes.
  • Don't overbrown!
  • Allow to cool before eating.
  • The cookies are ultra crumbly!