01 - Line an 8-inch square baking pan with parchment paper, leaving an overhang for easy removal later.
02 - Combine heavy cream and instant coffee granules in a small saucepan over low heat. Stir until coffee completely dissolves, then remove from heat and cool for 2 minutes.
03 - Place chocolate chips, sweetened condensed milk, and butter in a large microwave-safe bowl. Microwave in 30-second intervals, stirring after each, until completely melted and smooth, approximately 1½ to 2 minutes total.
04 - Stir vanilla extract, almond extract, salt, and cooled cream-coffee mixture into melted chocolate until fully incorporated. Fold in nuts if using.
05 - Pour mixture into prepared pan, smoothing top evenly with spatula. Refrigerate minimum 2 hours until firm.
06 - Lift fudge from pan using parchment overhang. Cut into 36 equal squares.