Corn Mixture is very easy to prepare from the scratch at home. Yes It tastes as good as the one you buy from the bakery. I learnt to make Corn Mixture from my close friend Seema.
The main ingredient you will need is Raw Corn poha. It is available in most of the Indian stores, usually kept next to the poha and murmura. It looks like poha but little tougher and yellow as shown in the picture here.
200 gm corn poha
1 tsp red chili powder
1/2 tsp salt
2 tsp sugar
2 sprig curry leaves, optional
2-3 tsp groundnut, optional
1 tsp cashew, optional
1 tsp raisins, optional
oil for frying
Mix red chili powder, salt and sugar in a small cup and set aside.
Heat oil in a deep fry wok. If you use deep fry thermometer, bring it to 300-350F or 150-175C. Add a few corn poha and see if it puffs up and remain crisp. You can eat a few and test that they are fully fried and crispy throughout. If the oil isn't hot enough, the poha remains hard inside and also it absorbs more oil.
Now add a handful of poha into the oil. Add only a little, they puff up and occupy a large area on the oil surface. Do not crowd the oil by adding too much of poha at a time. Remove the poha from the oil and drain on a paper towel. Sprinkle the chili-salt-sugar mixture on top of the hot poha. Continue frying another batch of poha and do the same until you are done with all the poha.
If using raw nuts, take a tsp of hot oil in a small wok, roast the nuts and add it to the poha. In the same oil roast curry leaves until it is crispy, drain on a paper towel and add to the poha. Add raisins. Mix well.
Let it cool. Store in a air tight container.