Prunus dulcis, the cultivated almond fruit, has been acknowledged as a source of nutrients in many traditional diets, and is progressively promoted as a healthy snack and ingredient. California, USA, is the major-almond producing area in the world. This book reviews the composition and characterization of almond and almond milk macro and micronutrients, specifically the lipids, proteins, carbohydrates (including dietary fiber), minerals, vitamins and microbiological content. Considering the positive and negative health effects of almonds vs. almond milk, this review intends to investigate their nutritional composition, with a focus on their physicochemical and microbiological characteristics.