You can bake khakhras easily in the oven. Just roll out and transfer them on the baking sheet. Bake at 180C for 12 minutes. Flip them once at the half time completion. Now stack all khakhra having a parchment paper in between. With another baking sheet press khakhra from top to down. Place them again on the baking sheet and bake at 160 for 20 minutes or till you see golden brown color.