Preheat the oven to 350°F (175°C) and prepare a cupcake tin with 24 liners.

In a large mixing bowl, combine Funfetti cake mix, eggs, water, and oil. Whisk until smooth, about 2 minutes.

Fill each cupcake liner about ¾ full with the batter.

Roll aluminum foil into 24 half-inch balls and place one into the center of each filled cupcake liner.

Bake in the preheated oven for 19 to 23 minutes. Check with a toothpick; it should come out clean.

Remove the cupcake tin from the oven and allow to cool for about 5 minutes before transferring to a wire rack to cool completely.

Prepare a shallow bowl with shaved white chocolate and melt in the microwave until smooth.

Once cooled, pipe buttercream frosting into a V-shape on each cupcake.

Cut large marshmallows in half and position them on top for bunny feet, then add mini marshmallows as tails.

Melt pink candy wafers and pipe small details on the marshmallow halves for decoration.