Preparation

1. In a medium bowl, sift together the flour, baking powder, baking soda, and salt until well combined, then set aside.
2. In a large mixing bowl, add butter, sugar, and eggs. Beat until light and airy.
3. Add sour cream and vanilla to the wet ingredients and mix until fully incorporated.
4. Slowly add in dry ingredients until just combined.
5. Cover dough and chill for 1-2 hours.
6. When ready to bake, preheat oven to 350 degrees F and line two baking sheets with parchment paper.
7. Scoop dough in 1/4 cup portions onto prepared baking sheets, leaving 2 inches between each scoop.
8. Mix together cinnamon and sugar in a small bowl, then sprinkle over each cookie.
9. Bake for 9-11 minutes or until edges just begin to turn golden.
10. Allow cookies to cool, then store in an airtight container.