These soft and chewy cookies are simple to make and can be modified easily with a variety of additional ingredients, so they're interesting every time. Slideshow: Great Cookie Recipes
Preheat the oven to 350°.
In a large mixing bowl cream the butter, sugars and eggs with an electric beater until well combined, about 2 minutes.
Add the flour, baking soda, vanilla, sea salt and cinnamon and mix until just combined. Stir in the oats, raisins and optional walnuts, coconut and/or chocolate chips until just combined.
Drop by heaping tablespoons onto an ungreased baking sheet, 9-12 cookies per sheet.
Bake the cookies for 12-15 minutes, or until they are slightly brown along the edges but still soft in the center.
Remove from the oven and let cool on the baking sheet for 5 minutes then transfer them to a baking sheet to finish cooling.
Cookies may be stored for up to 3 days in an airtight container at room temperature. Freeze for up to 3 months.