Put 2 T butter in rice cooker, melt. Grind onion in food processor or chopper until pulverized. Add to butter. Stir and cook for about 2 minutes.

Add rice, cook until rice glistens. Add broth and turmeric, stir until turmeric is dissolved. Close rice cooker and let cook!

When rice cooker is finished, stir in last two tablespoons of butter and add salt and/or pepper to taste.