Ingredients:

  • 1 cup (227g) unsalted butter, softened
  • 1 cup (200g) granulated sugar
  • 1/2 cup (100g) packed light brown sugar
  • 2 large eggs
  • 1 teaspoon vanilla extract
  • 2 1/2 cups (315g) all-purpose flour
  • 1 teaspoon baking soda
  • 1/2 teaspoon cream of tartar
  • 1/4 teaspoon salt
  • 2 tablespoons (25g) granulated sugar
  • 2 teaspoons ground cinnamon

Instructions:

  1. Preheat oven to 350°F (175°C). Line a 9x13 inch baking pan with parchment paper, leaving an overhang for easy removal.
  2. In a large bowl, cream together the softened butter, granulated sugar, and brown sugar until light and fluffy. Use an electric mixer for best results.
  3. Beat in the eggs one at a time, then stir in the vanilla extract.
  4. In a separate bowl, whisk together the flour, baking soda, cream of tartar, and salt.
  5. Gradually add the dry ingredients to the wet ingredients, mixing until just combined. Be careful not to overmix.
  6. Press about two-thirds of the dough evenly into the prepared baking pan.
  7. In a small bowl, combine the granulated sugar and cinnamon.
  8. Crumble the remaining one-third of the dough over the top of the pressed dough.
  9. Sprinkle the cinnamon-sugar mixture evenly over the crumbled dough.
  10. Bake for 25-30 minutes, or until the edges are golden brown and a toothpick inserted into the center comes out with moist crumbs.
  11. Let the bars cool completely in the pan before lifting them out using the parchment paper overhang. Cut into 16 squares. Enjoy your Chewy Snickerdoodle Cookie Bars!