01 - Preheat oven to 350°F. Grease a bundt pan or deep round baking dish thoroughly.
02 - In a large bowl, mix almond flour, protein powder, baking powder, and salt until evenly distributed.
03 - In a separate bowl, whisk Greek yogurt, eggs, almond milk, melted coconut oil, and vanilla extract until smooth and creamy.
04 - Pour wet ingredients into dry ingredients. Stir until a soft, pliable dough forms. The mixture should hold together when pressed.
05 - In a small bowl, combine erythritol and cinnamon for the coating mixture. Melt butter or coconut oil in a separate small bowl.
06 - Pinch off small pieces of dough, about 1 inch in diameter. Roll each piece into a ball. Dip each ball in melted butter or coconut oil, then roll thoroughly in the cinnamon mixture until coated.
07 - Arrange coated dough balls in the prepared pan, stacking them in layers. Leave slight space between pieces to allow for rising during baking.
08 - Bake for 25-30 minutes, or until the top is golden brown and the bread feels set when gently pressed.
09 - Let the bread cool in the pan for 10 minutes. This allows it to set slightly for easier removal.
10 - While bread cools, whisk plain Greek yogurt, powdered erythritol, and vanilla extract until smooth and creamy. Drizzle over warm bread before serving.