Prepare the Dough

1. Preheat the Oven: Preheat your oven to 350°F (175°C). Line two baking sheets with parchment paper or lightly grease them.
2. Mix the Dry Ingredients: In a medium-sized bowl, whisk together the flour, baking soda, salt, and cinnamon. Set aside.
3. Cream the Butter and Sugar: In a large bowl, beat the softened butter with the brown sugar and granulated sugar until the mixture is light and fluffy (about 3 minutes).
4. Add the Wet Ingredients: Beat in the egg, vanilla extract, orange zest, and orange juice until everything is well combined.
5. Incorporate the Dry Ingredients: Gradually add the dry ingredients into the wet mixture, stirring just until combined. Be careful not to overmix.
6. Add Cranberries and Oats: Stir in the cranberries and rolled oats, making sure they are evenly distributed throughout the dough.

Shape the Cookies

1. Scoop the Dough: Using a tablespoon or a cookie scoop, drop rounded balls of dough onto the prepared baking sheets, spacing them about 2 inches apart.
2. Flatten Slightly: Gently press each cookie ball down with the back of a spoon or your fingers to flatten them slightly. This will help them bake evenly.
3. Bake: Bake in the preheated oven for 10-12 minutes, or until the edges are golden brown and the centers are set.
4. Cool: Remove from the oven and allow the cookies to cool on the baking sheets for 5 minutes before transferring them to a wire rack to cool completely.