Preheat the oven to 325 degrees.

In a medium bowl, stir together flour, sugar, cocoa powder, and salt. Using a pastry blender {or your hands!}, cut in butter and food coloring until mixture resembles fine crumbs. Form into a ball and knead until smooth.

On a lightly floured surface, roll or pat the dough out to approximately a 1/2 inch thickness. Use a floured round cookie cutter to cut out the dough.

Place the cookies 1 inch apart on on ungreased cookie sheet and bake for 20-25 minutes until the centers are set. Cool.

In a saucepan, melt the white chocolate and shortening over low heat, stirring constantly. Roll the edges of the cookies in the melted chocolate and then sprinkle with the sugar flakes. Let stand until set.