Oreo Balls use cream cheese, so they have to be refrigerated. First for food safety, but also because they soften as they sit out at room temperature, and won’t hold the truffle together well if it gets too warm. They will last in the refrigerator wrapped tightly for 3-4 weeks.Click to see full answer. Beside this, how long can Oreo balls stay out of the fridge?Oreo balls should be kept in the fridge until you serve them. Plus, most people think oreo balls taste best when cold. However, oreo balls can be left at room temperature. According to the FDA, cream cheese can be left out at room temperature for up to 2 hours.Furthermore, can you mail Oreo balls? NO: you cannot mail cream cheese oreo truffles. It depends on when you are mailing them. I don’t see why they can’t be mailed as long as they are kept pretty cool. Because not everyone is going to refrigerate them after they get it but it can be. Moreover, do truffles need to be refrigerated? When stored at room temperature, these truffles should remain good for up to one to two weeks. However, if you store them in the refrigerator (which I recommend) they should last up to six months.How much do Oreo balls cost?I am sure people will respond but from what I’ve read on here most people set a price per person. So say she wants 100 oreo balls to feed 30 people..then you would charge $2-$3 per person depending on what you’re providing how decorated she wants them and how long they take you to do. Truffles of any kind, $1 each.