Dark chocolate and sweetened condensed milk form a smooth base for plenty of chopped walnuts in this easy microwave fudge. Chill it in a loaf pan, then slice into small chocolate squares with a nutty crunch.
Line an 8×4-inch (20×10 cm) loaf pan with parchment paper, leaving enough overhang to lift out the fudge.
Place 300 g dark chocolate, chopped, and 397 g sweetened condensed milk in a microwave-safe bowl. Microwave in 20–30-second intervals for about 5 minutes total, stirring thoroughly after each interval, until completely melted, smooth, and glossy.
Stir in 150 g walnuts, chopped, until evenly distributed. Transfer the chocolate walnut fudge mixture to the prepared pan and spread it into an even layer.
Refrigerate for at least 2 hours, or until firm. Lift the fudge from the pan, cut it into 28 pieces, and serve.
Notes
Walnut texture: Leave some walnut pieces slightly larger so the fudge has a noticeable crunch throughout.Gentle heating: Stir thoroughly between microwave intervals and stop heating once the chocolate is melted and smooth.Storage: Refrigerate in an airtight container for up to 1 week, separating stacked layers with parchment paper. Freeze for up to 2 months.