If you don't have a blender with a single-serve cup, you can make the dressing in a food processor. If you don't have that, you can make the dressing by hand by mixing all the ingredients together in a small bowl. It'll take a little longer to incorporate the olive oil into the mashed avocado, and the dressing may be a little thicker than the creamy spread you get from the blender, but it'll still be delicious.