How to Make a New York Egg Cream
To make a New York egg cream, start by adding 1 inch of chocolate syrup to a tall, chilled glass. Then, pour 1 inch of whole milk over the syrup, followed by enough cold soda water to fill the glass to about 1 inch below the rim. Finally, stir everything together with a long spoon and sip on your drink with a straw.
Get a tall, chilled, straight-sided, or Coca-Cola eight-ounce glass.  Spoon 1 inch (2.5 cm) of chocolate syrup (ideally U-bet Chocolate Flavor Syrup) into the glass.  Add 1 inch (2.5 cm) of whole milk over the syrup.  Pour in cold seltzer (aka soda water) making a nice foamy head to within 1 inch (2.5 cm) of the top of the glass. Use the spoon when pouring to prevent direct pouring into the syrup and milk. Stir vigorously with a long spoon to mix the syrup and milk into the seltzer foam.  Enjoy the true experience by sipping it slowly with a long straw. Use the straw to stir in between sips. Allow yourself to make sipping noise with the straw as you clean up the foam around the edge of the glass. Enjoy! 
Get a tall, chilled, straight-sided, or Coca-Cola eight-ounce glass. Spoon 1 inch (2.5 cm) of chocolate syrup (ideally U-bet Chocolate Flavor Syrup) into the glass. Add 1 inch (2.5 cm) of whole milk over the syrup. Pour in cold seltzer (aka soda water) making a nice foamy head to within 1 inch (2.5 cm) of the top of the glass. Stir vigorously with a long spoon to mix the syrup and milk into the seltzer foam. Enjoy the true experience by sipping it slowly with a long straw. 