To make the biscuit dough, combine wholewheat flour, cocoa powder and butter in a bowl. Using your fingers, break down butter cubes in dry ingredients and keep doing it till you reach a sandy texture.
Add in condensed milk in and bring the dough together.
Place the dough between two sheets of parchment paper and roll out the dough using a rolling pin. Roll it to about half an inch thick.
Now, using a knife or pizza cutter cut the dough 3*1.5 inches rectangles each. Using a skewer make classic dents on the top and sprinkle some granulated sugar.
Bake these in a preheated oven at 180 degree celsius for 10-12 minutes.
Meanwhile, prepare the chocolate cream by mixing butter and icing sugar until light and fluffy. Then combine cocoa powder and milk to make a smooth chocolate cream.
Once the biscuits come at room temperature, sandwich the biscuits with chocolate cream and enjoy!
Recipe by Bake with Shivesh at https://bakewithshivesh.com/homemade-bourbon-biscuit/