When we go short of certain ingredients at home, we can substitute it with home-made ones. Here are a few such ingredients which can be easily made at home.
Take a cup of All purpose flour, remove 2 tbsp of flour from it and add 2 tbsp of corn flour to it. Sieve it atleast 3 times.
Add 1 1/2 tsp of baking powder to1 cup of all purpose flour and sieve it 3 times to the least.