Membrillo (quince paste) contains only three ingredients: quince, sugar, and lemon, cooked into a reddish paste. The naturally high pectin content in the Valencian quince gives the paste its firm and jelly like texture. Using fruit from their own trees, Paiarrop’s membrillo is famous in Spain for being just like Grandma used to make; it is fresher tasting and less sugary than many commercially produced varieties. It has a shelf life of one year opened or unopened – the color darkens with age.