A method for manufacturing a fluid-based cooling element, wherein the fluid-based cooling element is configured for cooling a heat generating element arranged on a printed circuit board, wherein the method comprises: forming a base body comprising a plate-shaped base body portion and an inner base body portion integrally formed with the plate-shaped base body portion, wherein the step of forming the base body comprises forming the plate-shaped base body portion and the inner base body portion by means of die casting, wherein the inner base body portion comprises a plurality of protrusions (22a-22o, 24a-24o) formed on an upper side of the inner base body portion, wherein the plurality of protrusions (22a-22o, 24a-24o) comprises a first group of protrusions (22a-22o) and a second group of protrusions (24a-24o), wherein the protrusions (22a-22o, 24a-24o) define a plurality of fluid channels (23a-23p, 25a-25p) extending parallel to the upper surface of the plate-shaped base body portion, wherein any of the protrusions (22a-22o) of the first group extends into a first longitudinal direction parallel to an upper surface of the plate-shaped base body portion, wherein any of the protrusions (24a-24o) of the second group extends into a second longitudinal direction parallel to the upper surface of the plate-shaped base body portion, wherein the extension of the protrusions of the first group in the first longitudinal direction defines a first angle (α 1) with respect to a symmetry axis of the plurality of protrusions (22a-22o, 24a-24o) extending parallel to the upper surface of the plate-shaped base body portion, wherein the extension of the protrusions of the second group in the second longitudinal direction defines a second angle (α 2) with respect to the symmetry axis of the plurality of protrusions (22a-22o, 24a-24o) extending parallel to the upper surface of the plate-shaped base body portion, wherein the first angle (α 1) and/or the second angle (α 2) are equal to or larger than 15° and smaller than 90°, and wherein the protrusions (22a-22o, 24a-24o) have a gap size, defined as an average of the minimum distance between two adjacent protrusions (22a-22o) of the first group or between two adjacent protrusions (24a-24o) of the second group, in a range of 0.5 mm to 1.5 mm. forming a base body comprising a plate-shaped base body portion and an inner base body portion integrally formed with the plate-shaped base body portion, wherein the step of forming the base body comprises forming the plate-shaped base body portion and the inner base body portion by means of die casting, wherein the inner base body portion comprises a plurality of protrusions (22a-22o, 24a-24o) formed on an upper side of the inner base body portion, wherein the plurality of protrusions (22a-22o, 24a-24o) comprises a first group of protrusions (22a-22o) and a second group of protrusions (24a-24o), wherein the protrusions (22a-22o, 24a-24o) define a plurality of fluid channels (23a-23p, 25a-25p) extending parallel to the upper surface of the plate-shaped base body portion, wherein any of the protrusions (22a-22o) of the first group extends into a first longitudinal direction parallel to an upper surface of the plate-shaped base body portion, wherein any of the protrusions (24a-24o) of the second group extends into a second longitudinal direction parallel to the upper surface of the plate-shaped base body portion, wherein the extension of the protrusions of the first group in the first longitudinal direction defines a first angle (α 1) with respect to a symmetry axis of the plurality of protrusions (22a-22o, 24a-24o) extending parallel to the upper surface of the plate-shaped base body portion, wherein the extension of the protrusions of the second group in the second longitudinal direction defines a second angle (α 2) with respect to the symmetry axis of the plurality of protrusions (22a-22o, 24a-24o) extending parallel to the upper surface of the plate-shaped base body portion, wherein the first angle (α 1) and/or the second angle (α 2) are equal to or larger than 15° and smaller than 90°, and wherein the protrusions (22a-22o, 24a-24o) have a gap size, defined as an average of the minimum distance between two adjacent protrusions (22a-22o) of the first group or between two adjacent protrusions (24a-24o) of the second group, in a range of 0.5 mm to 1.5 mm.