Spray cast iron aebleskiver pan with buttered cooking spray.
Preheat to medium-low heat on the stove top.
Double sift the flour, salt, baking powder, baking soda, and sugar into a medium sized mixing bowl; set aside.
Separate the egg whites from the egg yolks into different bowls.
Add the buttermilk and butter to the egg yolks; whisk to combine.
Gently beat the egg whites and set aside.
Slowly mix the dry ingredients into the wet ingredients until the batter has formed.
Gently fold in the beaten egg whites, the batter should be the consistency of pancake batter.
Fill each cast iron ableskive cup ⅔ full of mixture.
Add a kitchen spoonful of raspberry jam (or your favorite filling) to the center of the batter
Turn with a fork or knitting needle when the batter starts to pull away from the pan.
They will be ready to plate when both sides are golden brown.
Notes
Can you freeze ebelskivers?
Yes, you can freeze the cooked ebelskivers, but not the batter. Store them in an air-tight, freezer safe container or bag.
How do you reheat aebleskivers?
Allow the frozen pancake balls to thaw. You can serve them room temperature, if you want, or toss them in a 300°F oven for 15-20 or until they've reached the desired warmth.