How to Make It
Preheat oven to 350°.
Line a large baking sheet with parchment paper.
Place the first 4 ingredients in a medium bowl, and beat with a mixer at high speed until well combined (about 2 minutes). Add 1 teaspoon lemon rind, vanilla extract, and egg yolks; beat until well blended.
Weigh or lightly spoon flours into dry measuring cups; level with a knife. Combine flours, baking soda, 1/2 teaspoon ground cinnamon, and 1/2 teaspoon salt; stir with a whisk. Add flour mixture to butter mixture; beat at low speed until well combined. Drop half of the dough by rounded tablespoons onto prepared baking sheet. Combine the remaining 1 teaspoon cinnamon and granulated sugar in a small bowl; sprinkle half of the cinnamon-sugar mixture evenly over cookies. Bake at 350° for 6 minutes; flatten cookies with the back of a spatula. Bake an additional 6 minutes. Cool on pans 1 minute. Remove from pans, and cool on wire racks. Repeat procedure with remaining dough and sugar mixture.