Baking mould for foodstuff, particularly for confectioneries such as panettonis and/or pies, said mould being of a one-piece type and being made of paper material, said paper material being composed of a first layer and a second layer, said first layer being coated by a film of oil-repellent and/or water-repellent material, said second layer being embossed and/or corrugated, under operative conditions of said mould, said first layer defining an inner surface of said mould, said mould comprising a bottom wall having a polygonal perimeter comprising a number of sides, said sides of the polygonal perimeter being defined by one or more creasing lines and extending for the same length, and a lateral wall perimetrally developing with respect to said bottom wall, said bottom wall and said lateral wall being connected without interruption at the polygonal perimeter of said bottom wall, under operative conditions of said mould, said lateral wall and said bottom wall defining a cavity, said cavity being defined below by said bottom wall and laterally by said lateral wall, said lateral wall comprising the plurality of creasing lines developing from said bottom wall, at least one creasing line developing from one or more vertexes of said polygonal perimeter of said bottom wall, said lateral wall having an upper end portion opposite to the bottom wall, said upper end portion having an at least partially curvilinear geometrical outline or an at least partially rectilinear geometrical outline; wherein i) said number of sides is comprised between 6 and 14; ii) said lateral wall comprises a predetermined number of pleats, each pleat comprising a lap region having a first and a second overlapping regions (16, 17), the first overlapping region comprising at least a first and a second portions (18, 19) of the inner surface of said lateral wall, the second overlapping region comprising at least a first and a second portions (20, 21) of the outer surface of said lateral wall, said pleats having, according to a cross-section, a substantially "Z" outline, said lap regions being placed according to an uniform trend along said lateral wall and being equally spaced from each other, said lateral wall being configured for defining a number of lap regions comprised between 6 and 14, said number of lap regions being equal to said number of sides of the polygonal perimeter; iii) at least two creasing lines develop from each vertex of said polygonal perimeter of said bottom wall, said two creasing lines developing from one same vertex extend at said lateral wall reciprocally away until they join said geometrical outline of said upper end portion of said lateral wall, said two creasing lines defining at said first and said second layers (9, 10) of said lateral wall a substantially triangular portion, said substantially triangular portion developing between said two creasing lines; iv) two creasing lines developing respectively from two adjacent vertexes of a side of said polygonal perimeter of said bottom wall define a sector at said lateral wall, the shape of said sector being defined by four sides; characterized in that v) said second layer defines an outer surface of said mould; and in that vi) the grammage of the paper material is less than 200 g/m 2. i) said number of sides is comprised between 6 and 14; ii) said lateral wall comprises a predetermined number of pleats, each pleat comprising a lap region having a first and a second overlapping regions (16, 17), the first overlapping region comprising at least a first and a second portions (18, 19) of the inner surface of said lateral wall, the second overlapping region comprising at least a first and a second portions (20, 21) of the outer surface of said lateral wall, said pleats having, according to a cross-section, a substantially "Z" outline, said lap regions being placed according to an uniform trend along said lateral wall and being equally spaced from each other, said lateral wall being configured for defining a number of lap regions comprised between 6 and 14, said number of lap regions being equal to said number of sides of the polygonal perimeter; iii) at least two creasing lines develop from each vertex of said polygonal perimeter of said bottom wall, said two creasing lines developing from one same vertex extend at said lateral wall reciprocally away until they join said geometrical outline of said upper end portion of said lateral wall, said two creasing lines defining at said first and said second layers (9, 10) of said lateral wall a substantially triangular portion, said substantially triangular portion developing between said two creasing lines; iv) two creasing lines developing respectively from two adjacent vertexes of a side of said polygonal perimeter of said bottom wall define a sector at said lateral wall, the shape of said sector being defined by four sides; characterized in that v) said second layer defines an outer surface of said mould; and in that vi) the grammage of the paper material is less than 200 g/m 2.