Peanut Butter No-Bake Cookies

Bring brown sugar, milk, and butter to a boil in a small saucepan, stirring occasionally. Boil 1 minute, then remove from heat. Stir in oats, peanut butter, vanilla, and salt until well combined. Transfer dough to a small heatproof bowl.

Drop level tablespoons of dough onto a parchment-lined baking sheet, pressing down slightly. Let stand, uncovered, at room temperature until cool and set, at least 1 hour. Drizzle with chocolate; refrigerate until chocolate is set, about 5 minutes. Cookies can be refrigerated in an airtight container up to 3 days. Bring to room temperature before serving.