Nutrition per serving may change if servings are adjusted.
½ cup low-fat milk
⅓ cup unsweetened cocoa powder, preferably Dutch-process
¼ teaspoon instant coffee granules dissolved in 1 tablespoon hot water
½ cup nonfat sweetened condensed milk
⅓ cup sugar
1 teaspoon vanilla extract
2 tablespoons semisweet chocolate chips
Pinch of salt
Whisk together milk, cocoa and coffee in a small heavy saucepan until smooth. Whisk in condensed milk and sugar. Whisking constantly, bring to a simmer over low heat; scrape bottom of pan frequently with whisk to prevent sauce from sticking and scorching. Continue to simmer for 1 minute, whisking constantly.
Remove from heat and stir in vanilla, chocolate chips and salt.
Make Ahead Tip: Refrigerate in a glass jar for up to 2 weeks. Reheat in the microwave or by placing the jar in a pot of simmering water.