01 - In a medium bowl, whisk together the instant pistachio pudding mix and cold milk for 2 minutes until thickened. Set aside to thicken further for about 5 minutes.
02 - In a separate bowl, beat the heavy whipping cream, powdered sugar, and vanilla extract until soft peaks form using a whisk or electric mixer.
03 - Prepare individual parfait glasses. Add a layer of crushed shortbread cookies or graham crackers at the bottom of each glass.
04 - Spoon a layer of pistachio pudding over the cookie crumbs, followed by a layer of whipped cream.
05 - Repeat the layers until the glasses are filled, finishing with whipped cream on top for an attractive presentation.
06 - Garnish each parfait with chopped pistachios, green sprinkles, and a fresh mint leaf if desired for festive flair.
07 - Refrigerate the parfaits for at least 30 minutes before serving to allow flavors to meld and achieve the best texture.