Here is the official Church teaching. During the consecration at the mass, the miracle of transubstantiation takes place. What that means is that bread and wine are no longer present, but Jesus in the fullness of his body, blood, soul and divinity are now present. To say that the bread and wine are still there is to hold to the heresy of consubstantiation, which was long ago condemned by the Catholic church as being erroneous. The accidents of bread and wine are there, but it is not bread and wine. If you think this is impossible, ask yourself a simple question. What is more difficult. For God to create all that is by a single thought, or to change something that he created into something else. Remember, the laws of nature are subject to God, not God to the laws of nature, which is his own creation. If one holds that the bread and wine are still present, you are holding to what most Protestant denominations believe, who believe in the true presence. If you believe that they are no longer present, you are Catholic. This is a Dogma of our faith, i.e., the species of bread and wine no longer being present. It is not open to discussion or debate by those who are Catholic.
Deacon Ed B