A prilling method comprising the steps of: providing a molten first component, mixing at least a second component with the molten first component, reacting the components to from a shear-rhinnable mixture; and prilling the shear-thinnable mixture wherein the prilling comprises mechanically agitating in the prill head to shear thin the shear-thinnable mixture sufficiently to permit prilling. The inventive method can be used to produce fertilizer product comprising ammonium sulfate nitrate.