I'd advise stay away from adding the milk. Butter can help toast the pastry. I haven’t tried out employing white chocolate but I do use a little bit tahini paste and it's beautifully fine. Hope this can help xx I melted my chocolate while in the microwave but You may https://fixdessertchocolatiers.com/uae/product/fix-chocolate-box-6-or-more-fix-chocolate-bars/