Snickerdoodles (NOT Gluten Free)

This is the first time I've ever baked Snickerdoodles and not have them be gluten free.
I have made snickerdoodles many times through my adolescence and high school, whether with my friend Lily, my mom, and/or by myself. Every time they were gluten free.
Gluten free snickerdoodles seem to usually be fluffier and frankly, I think they are more tasty than the conventional ones shown here.. not to say these weren't very tasty (a batch of 30 disappeared in one night)!
Recipe (courtesy of American Test Kitchen's 'Bakers Illustrated' cookbook, page 430):
2 1/4 cups unbleached all-purpose flour
2 teaspoons cream of tartar
1 teaspoon baking soda
1/2 teaspoon salt
12 tablespoons (1 1/2 sticks) unsalted butter, softened yet still cool
1/4 cup vegetable shortening
1 1/2 cups granulated sugar + 3 tablespoons for rolling dough
2 large eggs
1 tablespoon ground cinnamon for rolling dough
1. Adjust the oven rack to the upper- and lower-middle positions & heat the oven to 400 degrees. Line 2 large baking sheets with parchment paper or spray them with nonstick cooking spray.
2. Whisk the flour, cream of tartar, baking soda, and salt together in a medium bowl and set aside.
3. Either by hand or with an electric mixer, cream the butter, shortening, and the 1 1/2 cup sugar at medium speed until combined, 1 - 1 1/2 minutes. Scrape down the sides of the bowl with a rubber spatula. Add the eggs. Beat until combined, about 30 seconds.
4. Add the dry ingredients & beat at a low speed until just combined, about 20 seconds.
5. Mix the 3 tablespoons sugar for rolling & the cinnamon in a shallow bowl. Working with a heaping tablespoon of dough each time, roll the dough into 1 1/2" balls. Roll the balls in the cinnamon sugar & place them on the prepared baking sheets, spacing them about 2" apart.
Bake until the edges of the cookies are beginning to set & the centers are soft and puffy, 9 - 11 minutes, rotating the baking sheets front to back & top to bottom halfway through the baking time. Let the cookies cool on the baking sheets 2 - 3 minutes before transferring them with a wide metal spatula to a wire rack.





