Ingredients

The following ingredients have 8 Servings
  • 2⅓ cups all purpose flour
  • 1 teaspoon baking soda
  • 1 teaspoon cream of tartar
  • ½ teaspoon salt
  • ¾ cup unsalted butter (softened)
  • 1 cup granulated sugar
  • ½ cup light brown sugar (packed)
  • 2 large eggs
  • 1 teaspoon pure vanilla extract
  • 1 tablespoon granulated sugar
  • 1 tablespoon ground cinnamon

Instruction

  • Preheat the oven to 350 degrees. Grease a 13x9" baking dish with cooking spray.
  • In a medium bowl, whisk together the flour, baking soda, cream of tartar and salt. Set aside.
  • In a large bowl, beat the butter and the sugars until light and fluffy, about 2-3 minutes. Add the eggs one at a time, beating on low speed until incorporated. Beat in the vanilla. Beat in the dry ingredients on low speed until just combined.
  • Pour half of the batter into the prepared baking dish. The batter will be sticky, but spread it as evenly as you can. Sprinkle half of the cinnamon-sugar mixture over the batter.
  • Using a teaspoon, drop dollops of the remaining batter over the cinnamon-sugar mixture. The cinnamon-sugar mixture will still be visible in many areas. Sprinkle with the remaining cinnamon-sugar.
  • Bake for 25 minutes on the center rack of the oven. Remove from heat and cool on a wire rack for 1 hour. Cut into squares and enjoy!