Serve the warm pancake balls with butter and jam or dusted with powdered sugar. To make filled aebleskiver, add about 1/2 teaspoon jam to the batter in each cup just before you make the first turn. Serve the pancake balls as they are cooked, or keep warm in a napkin-lined basket until all are ready. The batter can also be cooked on a lightly buttered griddle over medium heat to make light, tender pancakes. For mile-high baking, reduce the baking powder to 2 1/2 teaspoons.