Begin by preparing your whipped cream: pour heavy cream into a mixing bowl, add powdered sugar and vanilla, then beat with a whisk or mixer until soft peaks form and it becomes fluffy.
Slice your mango into thin, bright pieces and set aside for layering.
Using a spatula, gently fold the prepared whipped cream into the chocolate pudding to create a light, airy mixture that holds its shape.
Start assembling the trifle by spooning a layer of the pudding mixture into the bottom of your clear glass dish, spreading it evenly with a spatula.
Add a layer of mango slices on top of the pudding, spreading them out to cover the surface.
Repeat the layering process: add another layer of pudding, followed by more mango slices, until the dish is filled, finishing with a pudding layer on top.
Cover the assembled trifle with plastic wrap and chill in the refrigerator for at least 2 hours, allowing the layers to set and flavors to meld.
Once chilled, decorate the top of the trifle with candy eyes, sprinkles, and a light sprinkle of edible glitter for a spooky, festive look.
Serve your colorful Halloween trifle chilled, and enjoy the fun textures and vibrant flavors with friends and family.