01 - Preheat oven to 350°F and lightly coat a loaf pan with butter or nonstick spray.
02 - If using, distribute chopped pecans evenly across the bottom of the prepared pan.
03 - In a large bowl, whisk together flour, vanilla protein powder, unflavored protein powder, baking powder, and baking soda until well combined.
04 - Add non-fat Greek yogurt to the dry mixture and gently mix until large, sticky dough clumps form. Avoid over-mixing to preserve tenderness.
05 - With lightly moistened hands, divide dough into 25 equal portions, each about 2 tablespoons. Roll each into a smooth ball, re-wetting palms as needed to prevent sticking.
06 - Pour almond milk into a small bowl. In another small bowl, blend the sugar replacement and ground cinnamon.
07 - Dip each dough ball in almond milk, then roll in cinnamon-sugar mixture. Place balls into the loaf pan, layering loosely.
08 - Place loaf pan in oven and bake uncovered for 20 minutes.
09 - Cover pan with foil and continue baking for an additional 15 to 20 minutes, or until a toothpick inserted into the center emerges clean.
10 - Allow baked bread to cool slightly before serving warm.