Line a cookie sheet with wax paper and set it aside.
Melt the white candy coating according to package directions giving special care not to overheat the candy. If the candy coating is overheated, it will be too thick. You can add 1 teaspoon of vegetable shortening or coconut oil to help thin the candy but do not add any other type of liquid as the candy will seize and harden.
Coat each cookie in melted candy. Place them on the prepared cookie sheet.
Immediately add a unicorn horn (and ears if using a kit) and almond slices for ears, candy eyes, and rainbow sprinkles as shown.
Allow the candy coating to harden before serving.
Store in an airtight container at room temperature. Placing in the refrigerator may cause the cookie to soften.