These easy Snickerdoodle Bars are everyone’s favorite snickerdoodle cookie in square bar form. They’re chewy, buttery, cinnamon-y, and amazing. Good luck only eating one!
Preheat oven to 350 degrees F. Line a 9x13 baking dish with parchment paper, leaving some overhang on the two longer sides for easy removal.
Pour melted butter into a large mixing bowl. Add in shortening, both sugars, eggs, and vanilla. Beat with a handheld mixer until combined. Add in flour, baking powder, cream of tartar, and salt. Continue to mix until well blended. (Batter will be thick.)
Using a spatula, transfer batter to the prepared dish and press/spread it out evenly. Mix together the 1/8 cup of sugar and cinnamon; sprinkle it over the top.
Bake for 30 minutes until a toothpick inserted in the center comes out almost clean.
Remove from the oven and allow to cook completely before separating from the parchment paper. Cut into bars and enjoy!
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Notes
Shortening is 100% fat, containing no water. This traps more air bubbles and has a higher melting point than butter, which helps the baked bars rise a bit more and provide a softer interior texture.Cream of Tartar is an acidic dry powder (found where all the spices are) and is a key ingredient when making snickerdoodles. It gives them their distinctive tangy flavor, and the chew happens because cream of tartar prevents sugar in the cookie dough from crystalizing into crunchiness. There really isn't a substitute. You can simply omit it, but the results won't be optimal.