A method of producing expanded nuts, the method comprising the steps of: (a) immersing a plurality of nut kernels in an aqueous liquid thereby hydrating at least a portion of each kernel； and (b) gun puffing the hydrated kernels causing at least one of expansion and blistering of at least an outer surface of the nut kernels. There is also disclosed a method of method of producing expanded nuts, the method comprising the steps of: (a) immersing a plurality of nut kernels in an aqueous liquid at a pressure of at least 100 MPa thereby hydrating at least a portion of each kernel； and (b) dehydrating the hydrated kernels causing at least one of expansion and blistering of at least an outer surface of the nut kernels.
