A folding spoon comprising: - a planar blank symmetrical along a longitudinal axis and having a handle portion with a front lateral edge and a bowl portion with a rear lateral edge and a plurality of folding lines disposed on said planar blank including - a longitudinal handle folding line extending from said front lateral edge along said longitudinal axis towards a rear lateral edge opposite said front lateral edge and terminating in the bowl portion, or - two longitudinal handle folding lines are provided on said planar blank symmetrically in relation to the longitudinal axis, - a first lateral folding line is arranged in said handle portion in a position closer to said rear lateral edge than to said front lateral edge and extending transversal to said longitudinal axis, - a second lateral folding line is arranged in said handle portion between said first lateral folding line and said front lateral edge in a distance from said first lateral folding line corresponding to the distance between said first lateral folding line and said rear lateral edge and extending transversal to said longitudinal axis, characterised in that - a cut out extends from said second lateral folding line toward said rear lateral edge and back to said second lateral folding line and thereby forms a retainer flap arranged to be placed behind an edge area at said rear lateral edge when the spoon is in folded condition, being folded along said first lateral folding line, said planar blank is made of paperboard sheet with a thickness greater than 300 μm. - a planar blank symmetrical along a longitudinal axis and having a handle portion with a front lateral edge and a bowl portion with a rear lateral edge and a plurality of folding lines disposed on said planar blank including - a longitudinal handle folding line extending from said front lateral edge along said longitudinal axis towards a rear lateral edge opposite said front lateral edge and terminating in the bowl portion, or - two longitudinal handle folding lines are provided on said planar blank symmetrically in relation to the longitudinal axis, - a longitudinal handle folding line extending from said front lateral edge along said longitudinal axis towards a rear lateral edge opposite said front lateral edge and terminating in the bowl portion, or - two longitudinal handle folding lines are provided on said planar blank symmetrically in relation to the longitudinal axis, - a first lateral folding line is arranged in said handle portion in a position closer to said rear lateral edge than to said front lateral edge and extending transversal to said longitudinal axis, - a second lateral folding line is arranged in said handle portion between said first lateral folding line and said front lateral edge in a distance from said first lateral folding line corresponding to the distance between said first lateral folding line and said rear lateral edge and extending transversal to said longitudinal axis, - a cut out extends from said second lateral folding line toward said rear lateral edge and back to said second lateral folding line and thereby forms a retainer flap arranged to be placed behind an edge area at said rear lateral edge when the spoon is in folded condition, being folded along said first lateral folding line, said planar blank is made of paperboard sheet with a thickness greater than 300 μm.