Whisk together milk, egg, sugar, cinnamon and sour cream. Add flour. Set aside.
Slice the cored pears into rings. Heat the oil in skillet. Dip rings into batter and place in hot oil. Fry until golden brown.
Top with vanilla ice cream and sprinkle with cinnamon-sugar and powered sugar, if desired. Drizzle with maple syrup and garnish with a mint leaf, if desired.