Sieve 1.5 cup jowar:ragi flour (5:1:), ¾ cup samo rice flour, ¼ cup+ 2 tbsp potato starch, 3 tbsp tapioca starch, 3 tbsp corn starch, 1 tsp salt. Add 1 tsp apple cider vinegar, ¼ cup soften butter, flax egg, yeast mixture, all ingredients except baking powder in a large bowl. Add warm water gradually. Knead with electric kneading rods for 10-15 minutes. Then add baking powder and 2 tbsp water.