Preheat the oven to 350°F. Spray a 9-inch square baking pan with nonstick spray.
In a medium bowl, whisk together the flour, baking powder, cinnamon, cream of tartar and salt.
In a large bowl, use an electric mixer to combine the sugar and butter. Add the eggs and vanilla and mix until well combined. Gently stir in the dry ingredients until incorporated. Stir in the cinnamon chips. Spread the batter into the prepared pan. Combine the topping ingredients and sprinkle evenly onto the batter.
Bake for 45 minutes, or until golden brown and a toothpick inserted in the center comes out somewhat clean. The blondies will feel firm when done, but the inside will be moist and tender.