Mix together yoghurt, flour, baking powder and salt measure in a large bowl until it forms a large ball. Knead dough on a clean surface, until no longer sticking to your hands (add a little bit more flour as needed).
Divide dough in half, then each half into 3 so you have 6 pieces. Lightly oil your work surface and roll out each piece of dough as thin as possible.
Heat a nonstick frypan on medium-high heat and cook flatbreads for about 1 minute each side, until golden and puffed slightly.
Brush cooked flatbreads with melted butter or garlic butter or serve plain.