Making Brown Sugar Oatmeal Cookies is simple. Follow these easy steps to get delicious cookies every time:

1. Preheat the Oven: Preheat your oven to 350°F (175°C) and line a baking sheet with parchment paper.
2. Cream the Butter and Sugars: In a large bowl, cream together the softened butter, brown sugar, and granulated sugar until light and fluffy.
3. Add Eggs and Vanilla: Beat in the eggs one at a time, ensuring each is fully incorporated. Then, add the vanilla extract and mix well.
4. Combine Dry Ingredients: In a separate bowl, combine the flour, baking soda, salt, and cinnamon (if using). Stir to mix evenly.
5. Combine Mixtures: Gradually add the dry ingredient mixture to the wet ingredients, stirring until thoroughly combined.
6. Add Oats: Fold in the rolled oats. If you’re adding chocolate chips or nuts, this is the time to add them as well.
7. Scoop Cookie Dough: Drop spoonfuls of cookie dough onto the prepared baking sheet, leaving space between each cookie to allow for spreading.
8. Bake: Place the baking sheet in the preheated oven and bake for 12-15 minutes or until the edges are golden brown. The centers may look slightly soft.
9. Cool Cookies: Remove from the oven and allow cookies to cool on the baking sheet for about 5 minutes. Then, transfer them to a wire rack to cool completely.

Enjoy the delightful cookies warm from the oven, or store them in an airtight container for later!