Mints are aromatic herbs that are almost exclusively perennial, that are very popular because of their pungent aroma.
They have wide-spreading underground and overground stolons and erect, square, branched stems.
The leaves are arranged in opposite pairs, from oblong to lanceolate, often downy, and with a serrated margin.
Leaf colors range from dark green and gray-green to purple, blue, and sometimes pale yellow.
The leaf, fresh or dried, is the culinary source of mint.
Fresh mint is usually preferred over dried mint when storage of the mint is not a problem.
The leaves have a warm, fresh, aromatic, sweet flavor with a cool aftertaste, and are used in teas, beverages, jellies, syrups, candies, and ice creams. (source)
So can hamsters eat mint leaves?
Yes they can eat mint leaves, they are fine for hamsters to eat.
Just a few leaves is enough for them and make sure they are washed thoroughly before hand to rid them of any unwanted bugs.