Ingredients
Equipment
Method
Step-by-Step Instructions
- Preheat your oven to 350°F (175°C) and prepare a 9x13-inch baking pan lined with parchment paper.
- In a medium bowl, combine all-purpose flour, baking soda, cream of tartar, and salt. Whisk until well combined.
- In a large mixing bowl, beat the softened unsalted butter and granulated sugar together until light and fluffy, about 2-3 minutes.
- Add in the egg and vanilla extract, mixing on low speed until fully combined and smooth.
- Gradually add the dry ingredients to the wet mixture, mixing gently on low speed until just incorporated.
- Pour the cookie batter into the prepared pan and spread it evenly with a spatula.
- Mix together the extra granulated sugar and ground cinnamon, then sprinkle over the batter.
- Bake in the preheated oven for 20-25 minutes, or until the edges are lightly golden and a toothpick comes out clean.
- Cool in the pan for 10-15 minutes, then lift out using the parchment overhang and let cool completely on a wire rack before slicing.
Nutrition
Notes
For best results, ensure butter is softened but not melted. Do not overmix to maintain chewiness. Let bars cool completely for clean slicing.
