Preheat your oven to 350°F (175°C). Line a baking sheet with parchment paper to ensure your cookies don’t stick during baking.
In a mixing bowl, combine the all-purpose flour, granulated sugar, cocoa powder, and salt. Mix them together until they are well combined.
Add the cold, cut-up salted butter to the dry ingredients. Using an electric mixer, beat the mixture on low speed until it resembles coarse crumbs.
Stir in the red food coloring and red velvet emulsion. Continue mixing until the color is evenly distributed throughout the dough, creating a rich red hue.
Using your hands, bring the dough together until it forms a ball. Roll out the dough on a floured surface to about ¼ inch thickness. Cut out your desired shapes using a cookie cutter or simply slice into squares.
Transfer the cookies to the prepared baking sheet, spacing them about 1 inch apart. Bake in the preheated oven for 12-15 minutes or until the edges are lightly golden. Allow them to cool on the baking sheet for a few minutes before transferring them to a wire rack to cool completely.
While the cookies cool, melt the white chocolate and shortening together in a microwave-safe bowl. Heat in 30-second intervals, stirring in between, until smooth and fully melted.
Once the cookies are cool, drizzle the melted white chocolate over the top of each cookie. Finish with a sprinkle of festive sprinkles while the chocolate is still wet.