Preheat your oven to 400 degrees and line a muffin tray with paper liners. Set the tray aside.
Combine the milk and lemon juice. Allow the mixture to sit at room temperature for 10 minutes (this will create a low FODMAP buttermilk substitute).
Combine the flour, brown sugar, granulated sugar, baking powder, cinnamon, ginger, and salt in a large bowl.
In a separate bowl, combine the eggs, pumpkin, butter, and buttermilk substitute.
Make a well in the center of the dry ingredients. Then pour the pumpkin mixture into the well and stir until the batter is just moistened (it will still be a little lumpy).
Place 1/4 cup of batter in each muffin well and bake for 18 – 20 minutes, or until a toothpick comes out clean. Cool the muffins on a wire rack.
Notes
Recommended low FODMAP serving – 1 muffin per sitting.