Place the blackberries and sugar in a medium pot and let them muddle together for about 10 minutes. (This is basically fruit gossip time. The berries soften up, the sugar gets nosy, and everyone spills their secrets.)

Mash the berries up a bit, then add the lemon juice and salt. Give it a good stir.

Put the whole shebang on medium heat and stir gently until the sugar dissolves completely.

Increase the heat to medium-high and bring the mixture to a boil. Boil for 10 minutes, stirring constantly. (Yes, constantly. No wandering off to check your phone unless you want blackberry lava redecorating your stovetop.)

Pour into a fancy jar—or a recycled pickle jar you swore you’d use someday—and seal with the lid.

Let it come to room temperature before refrigerating. Then do your best to make it last longer than three days. Good luck.