Get your oven ready by preheating it to 350°F (175°C), or whatever temperature your cookie dough package suggests. Line a baking sheet with parchment paper to prevent sticking.
On a piece of wax paper, gently flatten your cookie dough until it's about 1/4 to 1/2 inch thick. Use the rim of a small cup or a cookie cutter that matches the size of your clear ornament halves to cut out neat cookie circles.
Carefully place your shaped cookies onto the prepared baking sheet. Bake for about 8-12 minutes, keeping a close watch! You'll know they're ready when the edges are just lightly golden. Let them cool completely on the baking sheet before decorating.
Once your cookies are cool, spread a thin, even layer of vanilla frosting on top of each one. Carefully place a tiny Christmas trinket in the center of the frosting.
Sprinkle a little shredded coconut or white sprinkles over the trinket and frosting to create a magical snowy scene.
Gently set a clear ornament half over each decorated cookie. The frosting acts as a light adhesive, keeping everything in place. Now you have a delightful, edible snow globe!