Preheat oven to 350°F and line a muffin pan with liners (see note)
In medium mixing bowl combine flour, cinnamon, nutmeg, baking soda, and salt.
In a large mixing bowl combine wet hazelnut pulp, banana, mapel syrup, eggs, butter, and vanilla.
Add dry ingredients to the wet and mix until well combined. The batter will feel thick, don't panic!
Evenly distrubute batter into the lined muffin cups. Bake for 20-25 minutes. Check after 20 minutes by inserting a toothpick or butter knife into one of the muffins. You want it to come out mostly clean, but with a little bit sticking to the tester.