Mix together the ingredients. In a large bowl, beat together the condensed milk, cocoa powder, vanilla, and salt until smooth and combined. 14 ounces (1 can) sweetened condensed milk ½ cup (42 g) unsweetened cocoa powder 2 teaspoons vanilla extract ¼ teaspoon salt
Whip the cream. In a separate bowl, with an electric mixer beat the heavy cream on medium-high speed until firm peaks form about 3 to 5 minutes.. 2 cups (480 ml) cold heavy whipping cream
Fold together. Fold the whipped cream into the condensed milk mixture until smooth and combined.
Add the brownies. Fold in the brownie chunks, reserving a small handful for the top if desired. 2 cups brownie chunks
Layer and swirl. Transfer half of the ice cream mixture to a chilled 9x5-inch loaf pan. Dollop half of the hot fudge over the top and swirl with the tip of a knife. Add the remaining ice cream and top. Add remaining hot fudge. Use a knife to gently swirl. Sprinkle the reserved brownie pieces over the top. 1 cup hot fudge sauce
Freeze. Cover tightly and freeze for at least 6 hours, or overnight, until firm.