Add enough Easter sprinkles to a shallow bowl to cover the bottom in a thin layer. In a second small bowl, add pink sanding sugar.
Using kitchen scissors, cut two large marshmallows diagonally to create two sets of oval-shaped bunny ears.
Lightly press the sticky side of each marshmallow ear into the sanding sugar to create the pink inner ear detail.
Cut a slit in each marshmallow ear to allow them to sit on the rims of the cups.
Turn each cup upside down and gently dip the rim into a tub of frosting or marshmallow fluff, rotating to coat evenly. (If the rims of your cups don't fit, you can spoon the frosting or fluff into a third shallow bowl, or use a knife to spread the mixture on the rims.)
Immediately dip the frosted rim into the sprinkles, pressing lightly so they stick all the way around.
Using a sharpie marker, draw eyes, a nose, and whiskers on the front of each cup. Then gently press two marshmallow ears into the sprinkle rim to form the bunny’s ears.
Allow the cups to sit for a few minutes so the sprinkles fully set before filling or serving.
Once set, fill the bunny cups with milk, or a fun easter drink.
