Abstract: A system (10) for producing a beverage comprising: a capsule (20) provided with a container body (21) defining a containment compartment adapted to contain therein a dose of a food substance for producing the beverage, which container body (21) comprises a side wall (23) delimiting an access opening (24) to the containment compartment (22) of the food substance, and a bottom, adapted to close the container body (21) at one end thereof opposite the access opening (24), said bottom comprising a bottom wall (26) and a groove (27), said groove (27) being provided with: a base wall (271) delimited by two opposite edges (B1, B2), and two opposite side walls (272a, b) connecting the base wall (271) and the bottom wall (26), each of which originates from a respective edge (B1, B2) of the base wall (271), a machine (30) for delivering said beverage, the machine (30) being provided with an extraction unit (33) comprising a housing seat (331) for the capsule (20), and a cutting element (336), configured to pierce