Preheat oven to 350 degrees F
Add brown sugar to melted butter and mix.
In a large bowl add the flours, oats, baking soda, salt and whisk together. Add the butter/sugar mixture and mix using a mixer at medium speed until well blended. Add the vanilla and egg.
Mix until combined. Fold in the chocolate chips.
Spoon rounded tablespoons of dough onto a baking sheet lined with silpat or parchment paper.
Bake cookies for 10-12 minutes, until light browned around the edges.
Remove cookies and set on a wire rack to cool.