In a large bowl, whisk together lukewarm milk and yeast. Set it aside for 5 minutes (the mixture should become foamy).
Add oil, yogurt, and egg to the milk mixture and mix well. Add flour, sugar, cardamom, and baking powder. Knead the mixture together until a smooth dough is formed, about 10 minutes.
Preheat oven to 350°F and set aside an aluminum foil lined 9x13-inch pan (or two 9-inch round pans) brushed with oil.
Bake the Roht until golden brown, about 25 to 30 minutes. Cool completely. Slice and store in an airtight container at room temperature.