Preheat the oven 350 F. Line a large baking sheet with parchment paper.

In a large mixing bowl, add the flour, Greek yogurt, baking powder, and salt. Mix on medium high for a few minutes until a dough is formed. A lot of dough will likely clump in the whisk attachment - you can stop every so often to remove it.

In a small bowl, add the sugar and cinnamon and mix to make cinnamon sugar. Add about 1/3 of the mixture to the mixing bowl and mix for a few seconds, until just combined.

Roll the dough into a large ball and separate it into 8 even pieces. On a floured surface, roll each piece into a thick strand. Form the strands into a circular ball shape, using your fingers to securely pinch the ends together. Repeat for all 8 bagels.

Brush the top of each bagel with egg wash. Top generously with the remaining cinnamon sugar.

Let the bagels fully cool and then slice and serve.