Everyone will like these snickerdoodle cookies. They are soft and delicious, and with just the right amount of spice. Set them out at your next social gathering and everyone will be asking for the recipe. These snickerdoodles, that were once my Granny's recipe, have become very popular with my friends at church — and the ones that know me best!
Preheat the oven to 400 degrees F (200 degrees C).
Make cookies: Beat sugar, butter, shortening, eggs, and vanilla in a large bowl until smooth and creamy.
Whisk flour, cream of tartar, baking soda, and salt together in a separate bowl. Gradually mix dry ingredients mixture into the wet ingredients just until combined. Shape dough into walnut-sized balls.
Make cinnamon-sugar: Combine sugar and cinnamon in a small bowl or zip-top plastic bag.
Place dough balls in cinnamon-sugar and roll or shake until coated. Place 2 inches apart on ungreased baking sheets.
Bake in the preheated oven until set but not too hard, 8 to 10 minutes, switching racks halfway through.
Remove from the oven and immediately transfer to wire racks to cool.