BY WHISKAFFAIR
In a small bowl, stir together custard powder and ¼ cup of cold milk to make a lump-free mixture.
Transfer 3 cups of milk and custard mixture to a medium size pan and mix well.
Heat it over medium heat until the custard thickens. Keep stirring continuously to avoid the formation of lumps.
Remove the pan from the heat and transfer the custard to a bowl. Cover the bowl with a cling wrap to avoid the formation of a cream layer on top. Refrigerate the custard for 1-2 hours or until it is nicely chilled.
Add the chilled custard, frozen milk, sugar, and vanilla extract to the medium jar of a blender and blend until smooth.
Pour the milkshake into 2-3 tall serving glasses. Add 2 teaspoons of soaked basil seeds to each glass and stir well.
Top the drinks with a scoop of vanilla ice cream. Garnish with chocolate syrup and mint leaves. Serve chilled.