Rub a little of the unsalted butter into each indentation of a well-heated aebleskivers pan. With a paper towel, remove excess butter. Place about 1 tablespoon batter in each indentation, top with about 1⁄2 teaspoon of preserves of choice, and add another tablespoon of batter on top. Cook until the sides are set and bottom is golden brown, about 2 minutes.