In a large mixing bowl, combine the cold diced butter, powdered sugar, and salt. Blend with an electric mixer on low speed until well combined into a soft mixture.

Add the vanilla extract and continue mixing until fully incorporated.

Gradually add the all-purpose flour, mixing until a pliable dough forms.

Dust a clean surface with flour and roll the dough out to approximately ⅓ inch thick.

Use a sharp knife or cookie cutter to cut out tree shapes. Aim for about 15 cookies.

Transfer the cut dough onto parchment-lined baking sheets, spacing them about an inch apart. Refrigerate for about 30 minutes.

Preheat the oven to 350°F.

Bake a sheet of cookies for approximately 12 minutes, until edges are firm but the center remains soft.

Allow cookies to cool on the baking sheet for about five minutes before transferring to a wire rack.

Melt the white chocolate in a microwave-safe bowl in 30-second intervals, stirring until smooth.

Stir in green food coloring until the desired color is achieved. Pour the melted chocolate into a piping bag.

Pipe festive designs onto the cooled cookies and sprinkle with colorful decorations.

Allow the decorated chocolate to dry completely before storing in an airtight container.