Jam is a traditional preserve that has been evolving since Roman times. In the 1st century AD there are writings that mention recipes that can be associated with the current jam.
The recipe for a good Mallorcan jam is simple: cook the finely chopped fruit without the skin in water and with more than 60% sugar. The proportion of fruit and sugar varies according to the type of fruit, according to its natural sweetness and state of ripening, and, above all, according to the taste of our godmother… That’s it: the best recipes are from our godmothers .
You cannot make jam from all fruits, as it is important that they contain pectin . Although there are fruits, such as apples or citrus fruits, that can make jam by themselves; others, like blackberries, need an additional addition of pectin in the form of lemon juice or a little apple.