01 - Preheat oven to 350°F. Grease a bundt pan or deep round baking dish with cooking spray or butter.
02 - In a large bowl, combine almond flour, protein powder, baking powder, and salt. Whisk until well blended.
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, mix erythritol and cinnamon until evenly combined.
06 - Pinch off small pieces of dough (about 1 inch). Roll into balls. Dip each ball in melted butter or coconut oil, then coat thoroughly in the cinnamon mixture.
07 - Arrange coated dough balls in the prepared pan, stacking them in layers. Leave some space between pieces for expansion during baking.
08 - Bake for 25-30 minutes, or until golden brown and set. A toothpick inserted should come out clean.
09 - Let the bread cool in the pan for 10 minutes. This allows it to set and makes removal easier.
10 - While bread cools, whisk Greek yogurt, powdered erythritol, and vanilla until smooth and drizzle-friendly.
11 - Invert the bread onto a serving plate. Drizzle with glaze if desired. Serve warm while soft and fragrant.