Prep Time::10 mins
Cook Time::20 mins
Additional Time:: 2 hrs 30 mins
Total Time:: 3 hrs
Servings::36
Yield::1 9-inch square pan
Ingredients
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3 cups bittersweet chocolate chips
1 (14 ounce) can sweetened condensed milk
1 splash vanilla extract
2 cups white sugar
⅔ cup milk
½ cup butter
½ cup heavy whipping cream
3 cups butterscotch chips
1 (7 ounce) jar marshmallow cream
1 pinch flaky sea salt (such as Maldon®)
Directions
Line a 9-inch square baking pan with parchment paper.
Combine chocolate chips, sweetened condensed milk, and vanilla extract in a heavy saucepan over medium-low heat; stir until melted, about 5 minutes. Pour into the lined baking pan.
Bring sugar, milk, and butter to a boil in another saucepan over medium heat. Cook at a boil until mixture turns golden and thickens slightly, 5 to 7 minutes. Pour in cream carefully; it may hiss and splatter. Bring back to a boil. Remove from heat; stir in butterscotch chips and marshmallow cream until smooth.
Pour butterscotch layer over the chocolate layer in the pan; sprinkle with sea salt. Allow fudge to cool to room temperature, about 30 minutes. Refrigerate until firm, about 2 hours.