Where do you get mass building carbs?

[1longdong]

34 yrs
6-1”
206 lbs
Goal: To have traps the size of your head.

I would love to get some ideas from you guys on where to get good mass building carbs from.

 

[Manuelmcom]

Rice, potatoes (sweet), pasta, oatmeal, those are my main building carbs.