The beauty of pesto is that you can pulse it to your desired consistency. Leaving a bit of chunkiness in the pesto adds extra texture to dishes, but pulsing it until it's smooth helps to incorporate the flavors further while allowing you to evenly coat whatever it is you're using it for. It all comes down to individual preference. If your pesto comes out too chunky when you'd prefer it smooth, add a small amount more of extra virgin olive oil and pulse again.