Mix flour, baking powder, and salt in a bowl.
Add yogurt and knead into a smooth dough.
Divide the dough into 4 pieces and roll each out into a round.
Spread cheese on one half of each flatbread, place the other half on top, and press the edges firmly together.
Heat a little butter in a pan and cook the flatbreads for 3–4 minutes on each side until golden brown, or until the cheese has melted.
Serve hot and enjoy immediately!