In a mixing bowl, combine all the dry ingredients, whisk, then add all the wet ingredients and whisk again until it's a smooth batter.
Add the blueberries and marzipan chunks to the batter. Give it a quick stir.
Fill the batter in muffin wrappers or use a lightly oiled muffin pan and put them in the oven for about 15-20 minutes. (Use the Toothpick Method to make sure the dough is done in the middle.)