In a large bowl, sift the flour, add the baking powder, granulated sugar and one teaspoon of cinnamon, and use a spatula to mix all the ingredients.
In a separate bowl, beat the eggs with the pinch of salt, pour in the milk, oil, vanilla extract and maple syrup.
Combine the wet ingredients with the dry ingredients, and mix to get a batter.
Preheat the oven to 190 degrees Celsius (375 Fahrenheit).
In a ramekin, combine the brown sugar with the remaining one teaspoon of cinnamon.
Line a 12-hole muffin tin with paper cases, add one tablespoon of batter to each paper case, and sprinkle brown sugar mixture over each of them.
Top with another tablespoon of batter, until the cases are ⅔ full.
Sprinkle the remaining brown sugar mixture over.
Bake for 20 minutes until the muffins are well risen, and a skewer inserted in the middle comes out clean.