Preheat the oven to 375 F
In a bowl, combine the flour, salt, garlic powder and baking powder.
Add in the greek yogurt and start mixing together with your hands. The dough may feel wet and sticky at first, but continue mixing with your hands to form a smoother dough.
Transfer the dough to a lightly floured surface and continue kneading the dough for a couple of minutes. I suggest adding a little extra flour to you hands if the dough is sticky.
Split the dough into 6 equal balls. Stretch each ball out gently in your palm into a flat, circular shape that's big enough to fit half a cheese stick. Add half of a cheese stick to the center. Roll the dough over the cheese stick to form your breadstick, making sure to close off any open ends. Repeat with remaining dough.
Place the shaped breadsticks on a parchment lined baking sheet. Bake for about 10-12 minutes, and then broil for 1-2 minutes. If some of the cheese oozes out to the sides after baking, spoon it back into the breadstick while it's still hot.
Combine the melted butter, garlic and dry parsley together in a bowl and brush the mixture over each breadstick. Serve warm with marinara sauce