1Heat oven to 150℉. Place an oven-safe bowl on rack to warm.
2Heat half and half in a small saucepan to lukewarm.
3Turn the oven off and remove the bowl. In the bowl, mix the yeast, sugar, salt, and flour.
4Add the milk and beat with an electric hand mixer.
5Add the eggs, one at a time, beating well after each addition.
6Cover with a tea towel and return the bowl to the oven.
7Let dough rise in the oven 1-1.5 hours until doubled in size.
8Heat an aebleskiver pan over medium heat until hot. Brush butter or shortening in each hole to grease.
9Fill each cup with about 2 tablespoons of batter, immediately adding filling (raisins, apple compote, etc. if using). Use a wooden skewer, chopstick, knitting needle, or fork to flip them over half way, letting the batter slide around to fill in the bottom of the cup.
10Continue cooking, turning the aebleskiver again to let the batter fill in the remainder of the sphere and continuing to turn until golden brown all the way around and cooked through.
11Transfer to a serving plate and dust with powdered sugar. Eat with jam or syrup if desired.
