Preheat oven to 350°. Melt butter in microwave. Add chocolate and mix until thoroughly incorporated. Stir in vanilla and eggs. Mix in sugar, then add salt and flour.
Spray a mini muffin tin with non-stick baking spray with flour. Use about 1 tablespoon of batter for each blondie. Bake 10 minutes. Let cool in pan for 5 minutes and place onto a baking rack to cool completely.
To make frosting, use a stand or hand mixer to combine butter and cream cheese. Mix in vanilla and whipping cream. Add powdered sugar in 1/2 cup portions, until fully incorporated. Frost blondies and sprinkle with coconut.
To make bunny feet, cut mini marshmallows in half and roll cut end in sprinkles. Attach bunny feet to blondie sides with frosting.