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Fermentation has been applied to a multitude of food types for preservation and product enhancing characteristics. Interest in the microbiome and healthy foods makes it important to understand the microbial processes involved in fermentation. This is particularly the case for products such as fermented cashew (<i>Anacardium</i><i> </i><i>occidentale</i>). We hereby describe the characterisation of cashew samples throughout an entire fermentation production process, starting at the quinoa starter inoculum (rejuvelac). The viable bacterial count was 10⁸-10⁹ colony forming units/g. The nutritional composition changed marginally with regards to fats, carbohydrates, vitamins, and minerals. The rejuvelac starter culture was predominated by <i>Pediococcus</i> and <i>Weis</i><i>s</i><i>ella</i> genera. The &#8216;brie&#8217; and &#8216;blue&#8217; cashew products became dominated by <i>Lactococcus</i>, <i>Pediococcus</i>, and <i>Wei</i><i>s</i><i>sella</i> genera as the fermentation progressed. Cashew allergenicity was found to significantly decrease with fermentation of all the end-product types. For consumers concerned about allergic reactions to cashew nuts, these results suggested that a safer option is for products to be made by fermentation.