01 -
Line an 8-inch square baking pan with parchment paper.
02 -
In a medium saucepan, combine the sugar, heavy cream, and whole milk. Place over medium heat and cook, stirring occasionally, until the sugar dissolves.
03 -
Increase the heat to medium-high and bring the mixture to a boil. Use a candy thermometer to monitor the temperature.
04 -
Reduce the heat to medium-low and simmer until the mixture reaches 235°F (118°C), the soft-ball stage.
05 -
Remove the saucepan from the heat and stir in the chocolate chips until they are melted and the mixture is smooth.
06 -
Stir in the vanilla extract, coffee powder, and sea salt.
07 -
Pour the mixture into the prepared baking pan and smooth the top.
08 -
Drizzle the caramel sauce over the top of the fudge.
09 -
Let the fudge cool to room temperature, then refrigerate until set, about 2 hours.
10 -
Cut into squares and serve.