Sweet Potato Surprise Balls

4 large sweet potatoes
1 cup broken pecans
1 cup crushed corn flakes
1 tablespoon flour
3/4 cup granulated sugar
2 tablespoons milk
1 teaspoon ground cinnamon
1 teaspoon vanilla extract
Bourbon, to taste
1/4 teaspoon baking powder
Large marshmallows, halved
Vegetable oil

Peel, slice and boil potatoes until done. Drain well and mash until smooth. Add remaining ingredients except marshmallows and oil and mix well. Chill for easier handling. Mold sweet potatoes around marshmallow halves; shape each into a ball and roll in additional crushed corn flakes. Refrigerate briefly to set. Fry in deep oil at 375 degrees F about 3 to 4 minutes or until lightly browned. Drain well.