Did not have any vegan chips, but I did have a hunk of Trader Joe's chocolate. At TJ's there is a physical list of Vegan Friendly Products - just ask at the customer service center! This bar of chocolate is a real value item too. For the recipe, I used a chef's knife and chopped the sh** out of a small hunk of the bar.
Again, there are some issues with pan size/ baking time/ proportions of wet and dry ingredients...the brownies were not cohesive squares when cut. They were crumbly but delicious and fudgy nonetheless. In fact, DP's dad wolfed down two at the dinner table! The brownies were extra energy needed to banish all helicopters on the front lawn!