In a medium bowl, combine 1½ teaspoons of the vanilla, the espresso, a pinch of salt and stir to mix well; it will seem slightly sludgy. Add the cream, condensed milk, and molasses. Taste and, if you want to boost the flavor a touch, add more vanilla, ¼ teaspoon at a time; the amount required depends on the vanilla and your palate. An extra pinch of salt sometimes helps too.
With an electric handheld mixer fitted with two beaters or a whisk attachment, whip the mixture at high speed for about 3 minutes (see note), until you get a firm, spreadable texture like fluffy whipped cream or frosting. Transfer to a 3-to 4-cup storage container, cover, and freeze until firm, 5 to 6 hours, or up to 2 weeks.
Let the ice cream sit at room temperature for 10 to 15 minutes to soften to a scoopable texture before serving.
Jenn's note: It's important not to over-whip the ice cream mixture, otherwise it will have a heavy, buttery quality. My mixture had the perfect fluffy whipped cream-like consistency between 2½ and 3 minutes.
Note: For coffee and chocolate ice cream, hand chop 1½ ounces bittersweet or dark chocolate into very small bits so they will disperse well. After whipping up the ice-cream mixture, use a spatula to gently fold in the chocolate. Freeze as directed. Your yield will be a little more than the original recipe.
