Khloe Kardashian and Tristan Thompson clearly had a hankerin' for the golden arches ... hitting the McDonald's drive-thru to pick up a bunch of grub.
Tristan and Khloe pulled up to the fast food joint Tuesday in Rialto, CA -- unclear what their whole order was, but eyewitnesses say it was a LOT of food.
We're told they did get some happy meals as part of their big order, so it's possible their kiddos True and new baby boy were in tow .