01 - Line an 8-inch square baking pan with parchment paper, allowing overhang on opposite sides for easy removal later.
02 - In a medium saucepan over low heat, combine sweetened condensed milk and butter. Stir continuously until butter melts completely and mixture is warmed through—avoid boiling.
03 - Remove saucepan from heat. Add white chocolate chips and stir vigorously until completely melted and smooth, ensuring no lumps remain.
04 - Pour in cooled coffee, vanilla extract, cocoa powder, almond extract, and instant espresso powder if using. Mix thoroughly until fully incorporated and mixture is uniformly smooth.
05 - Pour the fudge mixture into the prepared pan. Use a spatula to spread evenly and smooth the top surface.
06 - Sprinkle mini chocolate chips or chocolate shavings evenly over the top surface if desired, pressing gently to adhere.
07 - Refrigerate for at least 2 hours or until completely firm and set throughout.
08 - Using parchment overhang, lift fudge from pan. Cut into 24 equal squares with a sharp knife. Serve immediately or store refrigerated.