Grease 3 9-inch round cake pans with shortening (I cut parchment paper to fit the bottom of each pan for added non-stick action)
Melt butter over low heat
Pour melted butter into a large mixing bowl
Cream butter and sugar together by beating well with mixer
Add eggs, one at a time, while beating
Add vanilla then flour w/ baking powder
Add chocolate syrup and continue to beat well
Pour cake batter evenly into each of the 3 greased cake pans
Bake for 20-30 minutes (start with 20 minutes and use a toothpick to see whether center is cooked through, adding 5 minutes of baking time if toothpick does not come out clean)
After baking, set pans on cooling rack to cool completely.
Wrap each layer in plastic wrap and freeze overnight before frosting.
TO MAKE FROSTING
Melt chocolate chips and butter in a heat-safe bowl over a pot of boiling water (or in a double boiler if you have one) THIS IS IMPORTANT SO YOU DON'T BURN THE CHOCOLATE
In a large mixing bowl, stir hot milk into the powdered sugar and salt
Add vanilla, then melted chocolate mixture and beat until smooth.
Remove cake layers from freezer, unwrap, and frost while frozen.
Allow the cake several hours to thaw before serving.
The cake will be dense, fudgy and delicious!
Recipe by Daily Rebecca at https://www.dailyrebecca.com/2013/10/fudgiest-chocolate-cake/