You can use either old-fashioned oats (referred to as rolled oats) or quick-cook oats to make vegan chocolate no-bake cookies. I prefer quick-cook oats (otherwise known as instant oats) because they create a very soft texture in the cookie. Rolled oats are firmer and create a chewier cookie. However, if you prefer using rolled oats, give them a quick pulse or two in a food processor before adding them to the chocolate batter.