Melt the dark chocolate gently until smooth and glossy
Divide and pour the melted chocolate evenly into 5 Ziploc bags
Coat the inner sides of the bags by gently pressing and spreading the chocolate
Keep them aside to set slightly
In a separate bowl, beat the whipping cream just until slightly thickened
Add sifted cocoa powder, vanilla extract, and condensed milk
Beat until completely smooth and combined
Strain the mixture if lumps are present for a silky finish
If the mixture becomes too thick, microwave in 5-second intervals until it reaches pouring consistency
Pour the chocolate mixture into the prepared chocolate-lined bags
Seal properly
Freeze in an upright position for at least 4 hours until fully set
Cut open the bag and slide out to serve
