The phrase "big scoop" means getting important or exciting information or news before others, like uncovering a big secret and sharing it first. Full definition
It should also be noted that these cookies make for great ice cream sandwiches with a nice big scoop of vanilla ice cream placed between two of the colossal cookies. (spachethespatula.com)
A nice big scoop of creamy vanilla ice cream! (motherthyme.com)
Re: sub for cashews... We do one banana, one egg, big scoop of sun butter & vanilla & cinnamon. (elanaspantry.com)