Yummy! Apple Cinnamon Muffins

Perfect for ghastly fall-weather: warm apple-cinnamon muffins.
I used a recipe for normal muffin dough and added half of a grated apple, apple juice and cinnamon. I can't really remember how much cinnamon I used, I just tasted the dough a couple of times. Same goes for the apple juice.
So my modified recipe is this:

• 260 g flour
• 180 g sugar
• 2 tsp. baking powder
• a pinch of salt
• 280 ml milk (I used a little less milk because of the apple juice)
• 120g margarine
• 2 eggs
• 1 apple (grate one half and slice the other one)
• cinnamon
• unfiltered apple juice

Preheat your oven (200°). Mix the liquid and the solid ingredients separately, after that put them together. Add the grated apple, apple juice, cinnamon and stir everything. Fill the dough into the muffin cups and put two to three slices of apple on top and add a dash on cinnamon. Put them into the oven for about 20-30 minutes.