1. Using a rolling pin or similar object, crush about 2/3 of the Mother’s Mythical Creatures Cookies inside of the sealed bag until they resemble coarse gravel. 
2. Frost the rims of the serving glasses and sprinkle on an assortment of purple and silver sprinkles and some crushed Mother’s Mythical Creatures Cookies to coat. 
3. In a blender, combine ¾ cup of the crushed cookies, ice cream, milk, and vanilla extract. Blend on low speed until just combined.
4. Pour the milkshake into the prepared glasses, using a spatula to scrape out the blender if necessary.
5. Garnish with whipped cream and a sprinkle of the remaining cookie crumbs and colored sprinkles.
6. Serve immediately and enjoy!

Chef’s Notes

1. To frost the rims of your serving glasses, whip vanilla frosting with a fork until it is a spreadable consistency. If it’s too stiff, you can slightly soften it in the microwave for a few seconds. 
   
   Dip or spread a thin layer of frosting around the rim and coat with crushed Mother’s Cookies and sprinkles. For a heavier layer, dip or roll the edges in crushed Mother’s Cookies and sprinkles.
2. For a thinner milkshake, gradually add more milk. Begin with ¼ cup increments, stirring in additional milk until you achieve your preferred texture.
3. Customize the recipe by selecting your favorite flavors for the frosting and ice cream.
   
   If you love extra crunch, crush or garnish with additional whole cookies as desired