The invention relates to a baked product with a long shelf life with an upper baked part (1), a lower baked part (2), and an intermediate layer (3). The upper baked part (1) has a thickness S1 and has a rectangular shape in plan view. The rectangular shape is defined by a first edge with an edge length L11 and a second edge with an edge length L12 perpendicular to the first edge with an edge length L11; the first edge length L11 is greater than the second edge length L12; the first edge length L11 is 60 mm or less; and the ratio of the first edge length L11 to the second edge length L12 is 1.8 to 2.4. The lower baked part (2) has a thickness S2 and has a rectangular shape in plan view, wherein the rectangular shape is defined by a first edge with an edge length L21 and a second edge with an edge length L22 perpendicular to the first edge with an edge length L21; the first edge length L21 is greater than the second edge length L22; the first edge length L21 is 60 mm or less; and the ratio of the first edge len
