01 - Preheat oven to 350°F. Line a 12-cup muffin tin with cupcake liners.
02 - Whisk together flour, baking powder, and salt in a medium bowl.
03 - Beat butter and sugar in a large bowl until light and fluffy. Add eggs one at a time, beating well after each addition. Stir in vanilla.
04 - Add flour mixture to wet ingredients in three batches, alternating with milk. Mix gently until just combined.
05 - Divide batter evenly among cupcake liners. Bake for 18-20 minutes until a toothpick inserted in center comes out clean. Cool completely on wire rack.
06 - Beat butter until creamy. Gradually add powdered sugar, milk, vanilla, and salt. Beat until smooth and fluffy.
07 - Spread a generous layer of buttercream frosting over cooled cupcakes.
08 - Dip each frosted cupcake into shredded coconut, pressing gently to adhere.
09 - Cut mini marshmallows in half diagonally. Dip sticky cut sides into pink sanding sugar to create ears.
10 - Insert two marshmallow ears into each cupcake. Add candy eyes, pink jelly bean nose, and extra coconut for cheeks if desired.