Cream the butter, 1 ¼ cups sugar, brown sugar, vanilla, and almond extract together in the bowl of a stand mixer until light and fluffy.
Add the eggs and beat until well blended.
Gently stir in the sprinkles if you are using them.
Mix the flour, cream of tartar, baking soda, and salt together.
Beat into the butter mixture.
Roll dough into balls using a small cookie scoop or about 1-½ teaspoons of dough.
Chill for 30 minutes (optional but better)
Mix the remaining ¼ cup sugar and the cinnamon together on a plate or in a bowl.
Roll the balls in the sugar mixture.
Place 2 inches apart on ungreased baking sheets.
Bake for 8 to10 minutes, or until edges begin to turn golden and the centers are just set.
Let cool for a few minutes before removing from the sheet.
Video
Notes
Storage:Store in an airtight container or covered with plastic wrap for up to 5 days. Freeze for longer storage.I like to roll the dough into balls, flash freeze, and then store in Ziploc bags until I need a few to bake.Tip:
You can make the dough up to two days in advance. Cover it and keep it refrigerated. Just before serving, roll in cinnamon sugar and bake.
If you want big, fat, puffy snickerdoodle cookies leave the dough balls in a round shape when they go in the oven. If you want them to be flatter then press them down with the bottom of a glass that has been dipped in sugar.
Butternut flavoring is a combination of butter, vanilla, and almond flavors. You can leave it out completely or use almond flavor instead.
Add an extra egg yolk for an chewier, richer snickerdoodle cookie.
Most people don't realize that there are many kinds of cinnamon.My favorite is the Vietnamese cinnamon because it is spicier - a bit more intense and flavorful. If there's any way you can try all of them to see what you like best you should do so!
Bake these cookies just until the edges begin to turn golden and they are set in the center.