The phrase "little nuts" means someone is slightly crazy or behaves in an irrational or eccentric manner, but in a gentle or lighthearted way. Full definition
In the picture it looks like the cookies have little nut pieces, are those cashews or something else you added? (deliciouslyella.com)
You can also hide little nuts or berries in the middle of the balls, like pictured above (but this is completely optional). (theindigokitchen.com)
I've done creamy sauces using cashews before, so I knew we'd be able to find a way to make a creamy pasta sauce with these magical little nuts. (simplyquinoa.com)