#1 Soak 1lb coarsely ground coffee in 3 liters of filtered water for 24 hours in fridge #2 Filter out grounds to create cold brew concentrate #3 Make hazelnut syrup using hazelnut extract - put 1 cup water, 1 cup sugar, and 2 tsp hazelnut extract in a saucepan and bring to a boil. Once mixture boils, let simmer until thick and remove from heat #4 Combine ingredients and add ice.