1. Preheat oven to 350 degrees
2. Melt butter in small saucepan over low heat. Remove from heat and add brown sugar. Stir until smooth.
3. In medium bowl, combine flours, oats and salt. Combine the butter mixture with the dry ingredients, and add egg and vanilla.
4. Fold in chocolate. Mix well and spoon mixture by tablespoon fulls onto lightly greased baking sheets.
5. Bake for 12 minutes, until tops are dry to the touch.