Preheat oven to 400°F (200°C) and line a baking sheet with parchment. In a large bowl, whisk flour, baking powder, salt, and garlic powder. Add yogurt and stir until dough comes together, then briefly knead by hand.

Dust a work surface with flour, divide dough into 12 pieces, roll each into a 6 inch rope, tie into a knot, and place on the baking sheet.

In a small bowl, combine 3 tablespoons melted butter with garlic and parsley. Brush half the mixture over the knots.

Bake 12 to 15 minutes until golden brown and firm on the bottom. Brush with remaining garlic butter, sprinkle with flaky salt, and serve hot.