Add the sugar, butter, and shortening to a large mixing bowl. With a handheld or stand mixer, beat until a smooth mixture forms, about 1-2 minutes.
Now add the eggs. Beat for an additional 2 minutes, until the eggs are completely incorporated and the mixture is light and fluffy. Add the vanilla, and beat for another 30 seconds.
Add the dry ingredients
Now add the flour, almond flour, baking soda, cream of tartar, and salt. Mix until the dry ingredients are just incorporated. Do not to overmix.
Make the cinnamon/sugar mixture
In a cereal bowl, mix ¼ cup sugar and 1 tsp cinnamon together.
Roll the cookies
Roll the cookie dough into 1 ½ - 2 Tbsp sized balls.
Roll each cookie dough ball in the cinnamon sugar mixture, until each ball is completely coated.
Refrigerate the dough balls
Set the cookie dough balls on a few plates or a baking sheet, and refrigerate for 15 minutes.
Bake the cookies
Preheat the oven to 375 degrees.
Put 6-8 dough balls on a standard-sized baking sheet. Leave at least 2 inches between each dough ball. Flatten each ball slightly with your hand before baking.
Bake the cookies for 8 minutes. Remove them from the oven. The cookies will be slightly puffed, look undercooked, and be mostly white with slightly golden edges.
Let the cookies cool
Let the cookies cool on the baking sheet for 6 minutes. This is an important step. Don’t skip it.
Serve and enjoy!
Serve the snickerdoodles alone or with a glass of milk. Enjoy!
Notes
This recipe makes 24-26 snickerdoodles.These snickerdoodles are vegetarian.These snickerdoodles are inspired by Patricia Anfinson's recipe in Betty Crocker's Picture Cookbook (1950).