01 - Preheat oven to 350°F. Line two baking sheets with parchment paper.
02 - Whisk together flour, baking soda, salt, and cinnamon in a medium bowl.
03 - Beat butter, brown sugar, and granulated sugar until light and fluffy in a large bowl.
04 - Add eggs one at a time, mixing well after each addition, then stir in vanilla extract.
05 - Gradually mix dry ingredients into wet mixture until just combined.
06 - Fold in rolled oats and dried cranberries gently to distribute evenly.
07 - Drop tablespoon-sized portions of dough onto prepared sheets, spacing 2 inches apart.
08 - Bake for 10 to 12 minutes until edges are golden and centers appear set.
09 - Let cookies rest on baking sheets for 5 minutes, then transfer to wire rack to cool thoroughly.