Arrowroot cookies

Milk arrowroot biscuit from Arnotts was my children's favourite biscuit (or cookie if you speak US English) when we lived in Australia. But I haven't found it yet in the store here. That's why when I saw arrowroot flour or tepung garut/larut in Bahasa Indonesia at the supermarket, I grab it without thinking twice. 
From many recipes I chose this one from the perfect pantry because it used only arrowroot flour (without wheat flour). This cookie is crunchy yet melt in your mouth. My children loves it although that it is not the same with the arnott's one ^^