First, In a large bowl, cream together butter and sugars with an electric mixer until light and fluffy. Add in eggs and vanilla and mix until combined.
Next, Using a food processor, blender or grinder, grind oats to a fine powder. Combine oats, flour, salt, baking powder and baking soda and mix until combined.
Slowly add dry ingredients to the wet ingredients and mix until just combined. Add in chocolate chips, nuts and grated chocolate bar and stir until just combined.