01 - Preheat oven to 350°F. Grease and flour two 8-inch round cake pans thoroughly.
02 - Whisk together flour, baking powder, baking soda, and salt in a medium bowl until evenly distributed.
03 - Beat softened butter and granulated sugar in a large bowl until light and fluffy, approximately 3-4 minutes. Add eggs one at a time, incorporating fully after each addition. Stir in vanilla extract.
04 - Alternate adding flour mixture and milk to the creamed butter mixture, beginning and ending with the dry ingredients. Mix until just combined, being careful not to overmix.
05 - Divide batter evenly between prepared pans. Bake for 22-25 minutes until a toothpick inserted into the center emerges clean. Allow cakes to cool in pans for 10 minutes before transferring to wire racks to cool completely.
06 - Beat butter until smooth and creamy. Gradually incorporate sifted powdered sugar, vanilla extract, salt, and 2-3 tablespoons milk until achieving a spreadable consistency.
07 - Keep one cake round intact for the bunny's face. Cut the second round into two oval shapes for ears and shape the remaining center into a bow tie.
08 - Arrange face, ears, and bow tie on a large serving tray. Apply a thin layer of frosting over all cake pieces as a crumb coat. Refrigerate for 20 minutes to set.
09 - Spread remaining buttercream generously over the entire cake surface. Press shredded coconut firmly into the frosting to create a furry texture covering all exposed areas.
10 - Tint a small portion of coconut with pink food coloring and gently press onto the inner ear sections. Attach fondant or marshmallow ear details and position candies for eyes, nose, and whiskers.