A very quick and simple fudge to make with plenty of potential for variation and add-ins like:
pecans, walnuts, coconut, marshmallow, pretzels and any candy you can think of! (Henz)

Fudge

Ingredients

3 T butter
1 lb chocolate chips (semi-sweet)
14 oz container of sweetened condensed milk
2 tsp cinnamon
1 tsp vanilla
Kosher salt (sprinkle)
Plus any mix-ins (no real limit to how much you add)

Equipment
Metal or glass mixing bowl
Saucepan
Flat bottom tray for fudge to set
Picture
Just a few ingredients to make fudge.

Method

1. Gather all ingredients.

2. Begin to boil water in a small pot - you will use this as a "double boiler" to keep your chocolate mix at the right temperature.
 2. Chop butter into rough 1/2 inch cubes - to speed up the melting.

3. Combine sweetened condensed milk, butter, chocolate chips, cinnamon, and vanilla in a metal or glass bowl.
4. Once water on the stove is boiling gently, place bowl over the water and mix constantly until the ingredients are combined, melted and have a smooth consistency (it will be thick).
5. Remove bowl from heat and add in any desired mix ins and stir (in this batch we used around 3/4 cup pecans, 3/4 cup walnuts and 1/2 cup small pretzels).
6. Pour mixture into a shallow tray lined with wax paper - estimating in your choice of tray that the levels will be around 1/2 to 1 inch.

7. Sprinkle salt on top of mixture and move to fridge.  Allow at least 2 hours to set - but best of left overnight.
8. Chop into cubes and enjoy.