Making pasta in Little Alchemy is a very simple process. First, combine two earth elements, such as soil and rain, to create mud. Next, combine wheat and mud to create dough. Finally, combine dough with a tool element (such as a rolling pin or a knife) to get pasta.
If you are looking for extra help, Little Alchemy also has a cheat sheet you can use to guide you. All you need to do is type in “pasta” in the search box and it will show you a list of elements you need to combine together to get pasta.