For the candied bacon;
5 strips bacon
about 2 teaspoons light brown sugar

For the ice cream custard:
3 tablespoons (45g) salted butter
¾ cup (packed) brown sugar (140g), light or dark (you can use either)
2¾ (675ml) cup half-and-half
5 large egg yolks
2 teaspoons dark rum or whiskey
¼ teaspoon vanilla extract
optional: ¼ teaspoon ground cinnamon