Give the cranberries time: They don't start breaking down right away. Mine take about 10 minutes before they soften enough to easily press against the side of the saucepan.
Choose your texture: I like leaving a few pieces of cranberry in the jam, so I don't completely mash every berry. Keep going if you prefer yours smoother.
Stir more toward the end: As the cranberries break down and the jam thickens, keep a closer eye on the pan and stir frequently so the mixture doesn't catch on the bottom.
Remember it thickens as it cools: Don't keep cooking just because the hot jam looks a little looser than you'd like. It will thicken more once it cools.
Treat it as refrigerator jam: These jars are for refrigerating, freezing or gifting with instructions to keep chilled. This recipe hasn't been written as a shelf-stable canning recipe.
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