Combine the walnuts, cinnamon and sugar in a large bowl and set aside. In the bottom of a greased 9 by 13-inch pan, put 1 layer of phyllo and brush liberally with butter. Repeat 6 more times, buttering each delicate layer, until you have 7 layers of phyllo. Spoon 1/3 of the nut mixture over the phyllo and top with 5 more individually buttered sheets of phyllo. Repeat the process 2 more times and finish with 7 layers of phyllo. Brush the final layer with butter and bake until golden brown, about 50 minutes.
While the baklava is baking, make syrup. Add all of the syrup ingredients to a medium pot and bring to a boil over medium-low heat. Reduce the heat to low and simmer for 10 minutes.
Remove the baklava from the oven and pour the syrup evenly over the top. Cut into squares or diamonds and serve.
This recipe was provided by a chef, restaurant or culinary professional. It has not been tested for home use.