In a large mixing bowl or the bowl of a stand mixer, combine the cupcake mix, water, oil, and eggs. Mix on medium speed for about 2 minutes, scraping down the sides periodically, until the batter is smooth and well combined.

Divide the batter evenly among the cupcake liners, filling each about two-thirds full.

Bake for 14–16 minutes, or until the cupcakes are golden and a toothpick inserted into the center comes out clean. Let them cool completely before decorating.

Melt the white chocolate (or candy melts) in a microwave-safe bowl, heating in short intervals and stirring until smooth. Transfer to a piping bag. Repeat the process with the pink candy melts.

Lay a sheet of parchment paper on your work surface.

Using the melted white chocolate, pipe small flower-shaped designs to mimic bunny tails. It’s a good idea to make extra in case they break.

Pipe ovals for the bunny feet—two for each cupcake plus extras.

Add details to the feet: use the pink candy melts to pipe three small dots near the top of each oval and a larger oval in the center to represent the paw pad.

Let the chocolate decorations set completely before gently peeling them off the parchment paper.

In a large mixing bowl or stand mixer, combine half of the powdered sugar with the softened butter, vanilla extract, and salt. Mix on low speed until combined, scraping the sides of the bowl as needed.

Add the remaining powdered sugar and the milk. Continue mixing on low until incorporated, then increase the speed to medium and whip until the frosting is light, fluffy, and smooth.

Spread the sprinkles on a shallow plate or bowl.

Using an offset spatula, spread a thin layer of frosting on the top of each cooled cupcake. Immediately roll the edges of the cupcake in the sprinkles to coat the rim. Repeat for all cupcakes.

Transfer the remaining frosting to a piping bag fitted with a large round tip. Pipe a generous mound of frosting in the center of each cupcake.

Place a bunny tail decoration on top of the frosting mound. Position two bunny feet below the tail, angled downward to create a playful "bunny diving" effect.