Sieve together wheat flour,baking powder and baking soda...Mix and keep aside.
Add vinegar in milk and keep aside.
In a blender jar add chopped bananas and blend them to make a puree.
Now add milk,oil,sugar,and vanilla ess... And give it a spin.
Add this batter into wheat flour mix bowl and gently fold or whisk... Don't over fold or whisk...Batter should be thick.
Add chocolate chips / walnuts and mix gently.(I ve added chocolate chips)
Pour this batter into prepared muffins moulds or paper cup..And bake it in microwave for 30 min..On 180°. Convection mode..
Check by inserting toothpick.cupcakes is ready.