Melt butter in heavy-bottomed pot over medium heat.
Add onion and cook 1-2 minutes, until onion softens.
Add rice and cook 1-2 minutes until rice begins to take on translucent quality.
Add 1½ cups broth to the pot and cook, stirring gently.
When that liquid has been absorbed, add another cup of broth and cook until that liquid is absorbed, stirring frequently.
Continue until all the liquid has been added and absorbed by the rice, it may take up to 5 cups of broth.
The risotto should look creamy and have just a slight whiteness to the grains.
Remove from heat and add Parmesan, salt and pepper.
Notes
If you're pressed for time on a weeknight and don't have 30 minutes, try rice cooked in chicken broth and topped with parmesan cheese as a faster alternative.