How to Make Snowball “Custard Cream” Truffles! Now this recipe is basically an adaptation of one I tried in the summer using Oreo cookies and cream cheese. It is essentially the same but instead of using Oreos, I use the good old custard cream. To be honest I can’t stand these biscuits. I find them dry and sickly. In fact I’m not a biscuit fan at all. I’d take hummus and savoury snacks over biccies any day.