Add the dry ingredients in a bowl one by one. Add oat flour, Baking powder, baking soda, salt, cinnamon powder, cardamom powder, pumpkin pie spice powder and sugar and mix them well.
In a separate bowl add the mashed banana, vanilla extract, pumpkin puree, milk and mix them well until they blend together.
Now add the dry ingredients to the wet ingredients. Mix them well with one direction movement.
Pour the batter in a muffin cups. The batter should not be above the 3/4 of the caveat as they tend to rise.
Steam the muffins. Use a toothpick to check whether it is fully cooked. If the toothpick comes out without any batter the muffins are cooked.
