In small saucepan, melt butter and whisk in liquor and brown sugar. Stir in ginger and lemon zest and continue to cook for 2 minutes until combined and beginning to bubble.
Spray pan with cooking spray and pour brown sugar mixture into bottom of pan. Add cranberries to top of brown sugar mixture; set aside.
In medium mixing bowl, stir together flour, baking powder, salt and sugar.
In another bowl, whisk together oil, milk, eggs and vanilla.
Pour wet contents into bowl of dry contests and beat for 2 minutes with mixer or by hand, until well combined but not over mixed.
Pour batter over cranberries.
Bake for approximately 50 minutes in center rack of oven or until toothpick pulls clean.