Toast is sliced bread that has been browned by radiant heat. the browning is the result of a maillard reaction altering the flavor of the bread and making it firmer. the firm surface is easier to spread toppings on and the warmth can help butter reach its melting point. toasting is a common method of making stale bread more palatable. bread is toasted using a toaster or a toaster oven. toast may contain acrylamide caused by the browning process, which is suspected to be a carcinogen. however, claims that acrylamide in burnt toast causes cancer have not been proven.butter or margarine, and sweet toppings, such as jam or jelly, are commonly spread on toast. regionally, savory spreads, such ...

Source: Wikipedia