Pour Epsom salts onto a flat surface. Sprinkle in glitter, then mix. Apply a layer of decoupage adhesive to the candle sides using a paintbrush or foam brush. Keep glue away from the top and top edge of the candle so salts and glitter stay clear of the flame. While wet, lay the candle in the mix of salts and glitter. Lift, rotate, and set the candle back in the faux snow until all sides are covered. When dry, arrange as a centerpiece on a tray covered in fake flakes.