Add sugar, unsweetened cocoa powder, and evaporated milk to the saucepan. Over medium heat, bring the mixture to a full boil and boil for 7 minutes. Remove from the heat and stir in the vanilla.
Carefully pour the hot mixture into a blender. Be sure to vent the lid. Blend for 2 - 4 minutes. Add hot fudge to airtight containers and let cool before placing the lid on the container. Mason jars work perfectly for storing the sauce.
Serve immediately over your favorite flavor of ice cream.
Notes
Be super careful when blending the hot fudge sauce. You'll want to vent the blender and it's a good idea to place a kitchen towel over the blender lid for extra protection.
Be super careful when blending the hot fudge sauce. You'll want to vent the blender, and it's a good idea to place a kitchen towel over the lid for extra protection.