Mix the butter, sugar, eggs, and vanilla in a large bowl until well blended.

Add flour, cinnamon, lemon peel, baking powder, and salt to butter mixture and blend well.

Cover and refrigerate for 1-2 hours.

Preheat oven to 350 degrees F.

Line baking sheets with parchment and lightly spray with oil.

Shape dough into small balls, about 3/4" in diameter. Roll balls and coat in cinnamon sugar.

Place cookies 1 inch apart on prepared cookie sheet and bake 8-10 minutes or until the bottoms of the cookies are lightly browned. Cool for a minute in the pan then remove to rack to cool completely.