Mix whole wheat flour, gram flour, salt, turmeric, red chili powder, ajwain, and oil
Add water gradually and knead into a stiff dough
Cover the dough and rest it for 15 to 20 minutes
Divide the dough into small balls
Roll each ball into a very thin disc
Heat a tawa or skillet on low flame
Place the rolled disc on the hot tawa
Cook one side for a few seconds
Flip and cook the other side
Press gently with a cloth, spatula, or khakhra press while cooking
Keep turning and pressing until the khakhra becomes crisp and golden
Apply ghee or oil if desired
Cool completely on a wire rack
Store in an airtight container