WARNING: use liquid nitrogen at your own risk. See this article for safety primer: http://www.cookingissues.com/index.html%3Fpage_id=2958.html
RECIPE:
1 cup heavy whipping cream
1 cup half-and-half cream
1/3 cup maple syrup
1/4 cup bourbon
1 teaspoon vanilla extract
Add all ingredients to a bowl, and slowly add LN while stirring. It will take about 7 cups of LN to turn into ice cream. Enjoy!