Preheat oven to 350 degrees F. Spray 4 ramekins with nonstick cooking spray. Spoon 2 Tbsp. cranberry sauce into each ramekin. Place on a lined baking sheet.
In a medium bowl, mix butter, 2 Tbsp. sugar, flour, milk, baking powder, vanilla and salt with a wooden spoon. Spoon a heaping tablespoon of batter over fruit and spread evenly. Mix remaining 1 Tbsp. sugar and 1/4 cup warm water. Pour evenly over each ramekin.
Bake for 28-30 minutes, until topping is golden brown.
Serve warm with whipped cream or vanilla ice cream.