Kek Pandan Gula Melaka ( my version )

#kekpandangulamelaka cake 65ml thick coconut milk 1/2 cup fresh pandan juice 275g salted butter 1/4 tsp salt 225g caster sugar 5 eggs A 275g all purpose flour 1 tsp pandan paste 9 inch cake tin bake at 160c for 45 mins 200g gula melaka ( i use gula nisa) 1 daun pandan 1/4 cup water 1 tbsp sugar ( optional) 120g icing sugar 1/3 cup full cream milk 2 tbsp syrup gula melaka 1 tsp vannila extract 227g salted butter