Soft and Irresistible Snickerdoodle Cookies

Ingredients

• 1 tsp. vanilla extract
• 1 tsp. cream of tartar
• 1/4 tsp. salt
• 1 cup granulated sugar
• 1 large egg
• 1/2 tsp. baking soda
• 1 1/3 cups all-purpose flour
• 2 1/2 tsp. ground cinnamon
• 1/2 cup unsalted butter, softened