01 - Preheat oven to 350°F. Grease a bundt pan or deep round baking dish thoroughly with cooking spray or butter.
02 - In a large bowl, whisk together 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 with a spatula until a soft, pliable dough forms.
05 - In a small bowl, combine erythritol and cinnamon. Melt butter or coconut oil in a separate shallow dish for dipping.
06 - Pinch off small portions of dough, about 1 inch across. Roll into balls, dip in melted fat, then coat thoroughly in cinnamon mixture.
07 - Arrange coated dough balls in the prepared pan, stacking them loosely. Leave space for rising during baking.
08 - Bake for 25-30 minutes until tops are golden brown and bread feels set when touched lightly.
09 - Let bread rest in pan for 10 minutes to set. Invert onto serving plate.
10 - Whisk Greek yogurt, powdered erythritol, and vanilla until smooth. Drizzle over warm bread before serving.