Step 1

Place the ice cream, milk, vanilla extract, food coloring, and chocolate chips in a blender.

Step 2

Blend the ingredients together until the mixture is thick and smooth. Check the green color: blend in more food coloring if necessary to get a good, bright-green hue.

Step 3

Divide the mixture between two tall, chilled glasses.

Step 4

Add whipped cream to the tops of the milkshakes, dividing it between the glasses.

Step 5

Sprinkle green sprinkles over the whipped cream. Drop several Lucky Charms marshmallows onto the tops of each milkshake.

Step 6

Serve the milkshakes immediately with long spoons and straws. Sláinte!

Step 7

Add a few drops of mint extract to the blender. Start with just a couple of drops, then taste the mixture to see if it needs more. Another way is to use mint chocolate chip ice cream instead of vanilla.

Step 8

Add a few shots of liqueur to the blender, like butterscotch schnapps, vanilla vodka, Godiva chocolate or white chocolate liqueurs, or Kahlua. For mint milkshakes, add peppermint schnapps to the mixture.