There are a few methods you can use to mash and blend the ingredients for guacamole. You can use a mortar and pestle, which is the traditional method. This will give you a more authentic guacamole flavor. Alternatively, you can use a food processor or even a fork or whisk to mash and blend the ingredients together. If you're using a food processor, be careful not to over-process the mixture, or it will become too smooth. The goal is to have a slightly chunky texture. Whisking by hand will also give you more control over the final consistency. No matter what method you use, be sure to taste the guacamole and adjust the seasoning as needed before serving.