Preheat oven to 350° F (180°C).
In a bowl, whisk eggs, brown sugar, vanilla extract, pumpkin puree, milk and coconut oil. Add oat flour, fine whole wheat flour, baking powder, cinnamon and salt and mix until well-combined.
Add chocolate chips. Pour batter into greased muffin tin (or use muffin liners).
Bake for 27-30 minutes. Remove from oven, let cool for 30 minutes and store for up to 6 days.
Tip: warm the muffins for few minutes in the oven each time before consuming for a fresher texture :)