Cream the butter and sugar together in a bowl until it is fluffy.

Add the eggs one at a time.

Once the eggs are added, stir in the chocolate syrup.

Add the vanilla, flour, and salt and mix well.

Pour the brownie batter into a 9X13-inch greased baking pan.

Put the pan in the oven and bake at 350 degrees for 28-30 minutes.

Let the brownies cool completely before adding the frosting.

To make the frosting, combine the butter and sugar in a bowl.

Beat in the milk to get the thickness that you want.

Add the green food coloring and mix well.

Spread the frosting on top of the brownies. Put in the fridge to set, and then serve.