2Preheat your oven to 350°F (175°C).
In a large bowl, cream together the butter and brown sugar until smooth.
Beat in the egg and vanilla extract until well combined.
In a separate bowl, whisk together the whole wheat flour, baking soda, and salt.
Gradually add the dry ingredients to the wet ingredients, mixing until just combined.
Stir in the oatmeal until evenly distributed.
Drop spoonfuls of dough onto a baking sheet lined with parchment paper.
Bake for 10-12 minutes, or until the edges are golden brown.
Allow the cookies to cool on the baking sheet for a few minutes before transferring to a wire rack to cool completely.