In a small sauce pot, add the chocolate and melt over low heat. Once melted, stir in the milk and whisk to combine completely. Pour into blender and add strawberries and ice. Blend until completely smooth.
To make the whipped cream, place the blueberry preserves in a chilled bowl and whisk in a few tablespoons of the milk to loosen. Add the remaining cream, confectioners sugar, and beat until a medium peak.
Top the frozen hot chocolate with the blueberry whipped cream and garnish with sprinkles and unicorn horn.