This is difficult because snow sparkle is partly a viewing effect, not just a simple bright highlight. As you move your head, different ice crystals catch the light, and each eye sees slightly different glints. A single camera at one position and one instant records only the tiny set of reflections that hit the lens at that moment, so the scene often looks less sparkly than it did in person.

What can help:

• Use lots of depth of field so the glints stay as sharp points rather than soft bokeh. Stop down, use a wider lens, increase subject distance, or try focus stacking.
• Shoot closer details rather than a wide landscape; sparkle tends to show better in close-ups.
• Consider video instead of a still image. Sparkle is time-dependent, and slight motion makes the glints appear and disappear.

In short, you usually can’t reproduce the full perceived sparkle of frost in one static photo, but maximizing sharpness/DOF and shooting tighter compositions can improve it a lot.