The exact nutritional information will depend on what brand and type of gingerbread syrup you use as well as whether you use heavy cream or half and half. Refer to the back of the bottle for more accurate nutritional info.
Instead of heavy cream you can use half and half. Another option is to substitute with melted vanilla ice cream!
You can use any Irish Cream liqueur, it doesn’t have to be Baileys.
Chill your martini glasses either in the freezer or the refrigerator. Another way is to fill martini glasses with ice and top with cold water. Allow them to sit while you measure out your ingredients. Once you’re done shaking the cocktail, dump out the ice water and strain cocktail into the glass.