1/2 spoon baking powder
Step 1: Preparation
Peel the apples and cut them in small pieces. Put the butter in a bowl and add the 4 eggs. Stir everything together. Give the sugar in the bowl and stir again. Now mix baking powder & flour together and give it spoon by spoon in the bowl. Give cinnamon in the bowl and stir again. Put the applepieces in the bowl and mix everything together by hand.
Step 2: Finish
Now fill it into muffin forms and place almond pieces on top. Put the muffins in the oven at 160 degrees celsius circulating air for 20 to minutes. Let them cool down and meanwhile give a bit water to a bit powder sugar and stir it together. Scatter a bit cinnamon to it, mix it again till you have the consistency like honey. Brush the muffins with this mix. Let them dry and enjoy. Look at my other work.