Unpopular lemon shortbread

I made these lemon shortbread over a week ago. There are still 7 pieces left as pictured above. This is unusual in our household as most desserts are eaten very quickly. Husband doesn't like them because they are not sweet enough for his liking. Could it be that the recipe only use icing sugar and the sourness of the lemon mask all sweetness? I think they are allrigh. Anyway, I have to eat them all and I can only manage 1-2 a day. Anyone want any shortbread?