In a bowl, melt butter and chocolate in a microwave for a minute. Stir to combine.
Pour melted chocolate into the cake mix and combine well.
Pour batter into cake pan.
Bake at 180 degrees for half an hour or more till it is baked.
Cool the cake. Spread chocolate frosting over the cake. Refrigerate the cake for an hour.
Decorate with chocolate and berries of your choice as shown in picture.