In a large bowl, add the flour, baking soda, and salt. Mix to combine.
Add the Greek yogurt and olive oil to the bowl. Using your hands, mix well until the mixture forms a cohesive ball.
Place the dough onto a floured surface and continue to knead for another few minutes. Return the dough to the bowl, cover with a kitchen towel and let it sit for 10 minutes.
Cut the dough into 6 pieces. Roll each piece into a smooth ball.
Using a rolling pin on the floured surface, roll out each ball of dough until it’s very thin.
Heat a large cast iron skillet (or non-stick pan) over medium high heat. Once it’s hot, add the pita. Cook for a few minutes on each side until lightly golden and cooked through. Transfer the cooked pita to a plate and continue until all of the pita is finished.
Prepare the parsley butter. In a small bowl, add the butter and melt in the microwave (you can also place the butter in the skillet used to cook the pita and melt over the stove). Mix in the parsley. Brush the pitas with the parsley butter on both sides.