Preheat oven to 350°F and lightly butter a loaf pan.

Optional: Spread chopped pecans on the bottom of the loaf pan.

In a large bowl, combine flour, vanilla protein powder, unflavored protein powder, baking powder, and baking soda.

Add yogurt and mix until combined to form large shaggy, sticky dough clumps. DO NOT OVER-MIX.

Slightly wet your palms, divide dough into 25 pieces (about 2 tablespoon size) and roll into balls.

Pour some milk in a small bowl.

In a small shallow bowl, combine sugar and cinnamon.

Roll a dough ball in milk, then in cinnamon sugar mixture, and place in the loaf pan. Repeat with all balls.

Bake for 20 minutes, cover with foil, and bake another 10-15 minutes until cooked. A toothpick inserted should come out clean.