And as they were eating, Jesus took bread, and blessed [it], and brake [it], and gave [it] to the disciples, and said, Take, eat; this is my body.
Note 1 at Mt 26:26: The Lord's Supper actually took place in two parts during this Passover meal. The three Gospel writers who recorded the Lord's Supper recorded the breaking of the bread and the blessing of the wine in unbroken sequence because together, they make one new observance. But in actuality, Jesus washed the disciples' feet and prophesied Judas' betrayal between the sacraments of the bread and the wine.
Matthew and Mark made a point of saying that the sharing of the bread, which symbolized Jesus' broken body, was while they were eating (Mt 26:26 and Mr 14:22). Likewise, they prefaced their accounts of Jesus revealing Judas as the betrayer with the same statements of "as they did eat" (Mt 26:21 and Mr 14:18). However, Luke made it equally clear that it was after supper that Jesus took the cup and revealed that it symbolized His blood of the New Testament (Lu 22:20).
Therefore, these events separated the actual administration of the different elements of the Lord's Supper. The significance of this is beneficial in harmonizing the different accounts and takes nothing away from the observance of the bread and wine as being parts of the Lord's Supper.