01 - Preheat oven to 350°F. Generously grease a bundt pan or deep round baking dish with butter or coconut oil.
02 - In a large bowl, combine almond flour, protein powder, baking powder, and salt. Whisk thoroughly to break up any clumps.
03 - In a separate bowl, whisk Greek yogurt, eggs, almond milk, melted coconut oil, and vanilla extract until completely smooth.
04 - Pour wet ingredients into dry mixture. Stir until a soft, pliable dough forms. The dough will be slightly sticky.
05 - In a small bowl, mix erythritol and cinnamon until well combined.
06 - Pinch off approximately 1-inch pieces of dough and roll into balls. Dip each ball in melted butter or coconut oil, then roll thoroughly in the cinnamon-sweetener mixture.
07 - Arrange coated dough balls in the prepared pan, stacking them in layers. Leave slight space between pieces for expansion during baking.
08 - Bake for 25-30 minutes until golden brown and set. A toothpick inserted should come out clean.
09 - Let the bread cool in the pan for 10 minutes before attempting to remove.
10 - While bread cools, whisk Greek yogurt, powdered erythritol, and vanilla extract until smooth and drizzle-consistency.
11 - Invert onto serving plate. Drizzle glaze over warm bread. Serve immediately while still warm.