01 - Preheat oven to 350°F and generously grease a bundt pan or deep round baking dish with cooking spray or oil.
02 - In a large bowl, combine almond flour, vanilla protein powder, baking powder, and salt. Whisk thoroughly to eliminate any lumps.
03 - In a separate bowl, whisk Greek yogurt, eggs, almond milk, melted coconut oil, and vanilla extract until completely smooth and homogeneous.
04 - Pour wet ingredients into dry mixture. Stir with a spatula until soft dough comes together. The dough will be slightly sticky but manageable.
05 - In a small shallow bowl, combine erythritol sweetener and ground cinnamon. Mix well until evenly distributed.
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 cinnamon-sweetener mixture until coated on all sides.
07 - Arrange coated dough balls in prepared pan, stacking them evenly and leaving slight space between pieces for expansion during baking.
08 - Bake for 25-30 minutes until golden brown on top and set in the center. A toothpick inserted should come out clean.
09 - Let the bread cool in the pan for 10 minutes to set before removing or glazing.
10 - Whisk together Greek yogurt, powdered erythritol, and vanilla until smooth and drizzle-consistency. Pour over warm bread before serving.