Keep refrigerated, wrapped in cling film, for up to 5 days.
Cream cheese can be more or less liquid, depending on the brand and additives it contains. If the chilled mixture remains too liquid to be piped, a pinch or two of xanthan gum should thicken it nicely.
Any unused cream can be baked separately at 150°C fan for an 'extra' treat ?
You can either refrigerate the unused beaten egg for future use (up to 24 hours - wrapped in cling film), or give it to your dog who will be most grateful for the yummy delight!
The best way to ensure accurate measurement of ingredients is with Metric Kitchen Scales. They are inexpensive and take up very little space. Click
HERE for the ones I use. For U.S. option click
HERE.