Ingredients

  • 1-3/4 cup White Sugar, Divided
  • 1 Tablespoon Cinnamon
  • 2-1/2 cups Flour
  • 2 teaspoons Cream Of Tartar
  • 1 teaspoon Baking Soda
  • 1/2 teaspoons Salt
  • 8 Tablespoons Butter, Softened
  • 1/2 cups Vegetable Shortening
  • 2 whole Eggs

Method

  • Preheat the oven to 375F with a rack in the middle position. Combine 1/4 cup of the sugar and the cinnamon in a shallow rimmed dish for coating and set aside.
  • Whisk the flour, cream of tartar, baking soda and salt together in a medium bowl and set aside.
  • Beat the butter, shortening and remaining 11/2 cups of sugar together on medium speed until light and fluffy, 5 to 6 minutes (it will be very fluffy, like clouds). Beat in the eggs, one at a time, scraping down the bowl and beater as needed.
  • Reduce the mixer speed to low and slowly mix in the flour mixture until combined, about 30 seconds. Give the dough a final stir with a rubber spatula to make sure it is combined.
  • Roll into balls about the size of a ping pong ball, then roll in the cinnamon sugar. Place on parchment paper or mat lined baking sheets about 2" apart. Do not press the balls flat!
  • Bake until the edges are set and just beginning to brown, but the centers are still puffy, about 10 to 12 minutes.