pinaluto vs. pinalutuan

I learn in the chapter that pina means to ask someone to do something. But, I don't understand about adding the -an at the end.

Example:
1) Pinaluto ni Maristelle ang kusinera ng sopas para sa kapatid niya.
2) Pinalutuan ni Maristelle ng sopas ang kapatid niya sa kusinera.

I believe both mean "Maristelle asked the cook to make soup for her sibling." But, I still don't understand the different between the two.