Mix the almonds and sugar together. Add the beaten eggs and the flavouring and mix and knead very thoroughly.
*note. These need to be blanched almonds which you could grind yourself. The first time that I made this here in California I had to special order the ground almonds, not thinking that they wouldn't be blanched! Since then I've blanched and ground my own.
**note. I've not seen Rose Water for sale here in California, and have always left it out of any Marzipan I've made. If you wanted to try, you could boil insecticide free rose petals in some water, and then use the liquid.