The phrase "traditional jam" refers to a type of jam or preserve that is made in a traditional or classic way, typically using traditional ingredients and methods. Full definition
This decadent twist on classic British Victorian sponge cake is filled with creamy custard and fresh, ripe strawberries in place of traditional jam. (wallflourgirl.com)
Now, I don't know that much about traditional jam making — surprise, surprise! (happyhealthymotivated.com)
Traditional jams require a good amount of sugar, or a very long cooking time, to thicken up to the correct consistency. (couldntbeparve.com)