Follow these simple steps to create your Old-Fashioned Oatmeal Cookies:

1. Preheat Oven: Preheat your oven to 350°F (175°C). Line baking sheets with parchment paper.
2. Cream Butter and Sugars: In a large mixing bowl, cream 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, followed by the vanilla extract. Mix until well combined.
4. Combine Dry Ingredients: In a separate bowl, whisk together the flour, baking soda, cinnamon, and salt.
5. Mix Dry and Wet Ingredients: Gradually add the dry mixture to the wet mixture, mixing until just combined.
6. Add Oats: Stir in the old-fashioned oats until evenly distributed throughout the dough.
7. Add Optional Ingredients: If using raisins or chocolate chips, fold them into the dough at this stage.
8. Scoop Dough: Using a cookie scoop or spoon, drop rounded tablespoons of dough onto the prepared baking sheets, leaving enough space between each cookie.
9. Bake: Bake in the preheated oven for 10-12 minutes, or until the edges are golden brown and the centers are set.
10. Cool: Remove from the oven and allow the cookies to cool on the baking sheets for about 5 minutes before transferring them to wire racks to cool completely.

These steps will guide you toward creating a batch of delicious Old-Fashioned Oatmeal Cookies that will surely impress everyone!