Get Ready: Preheat your oven to 350°F (175°C). Lightly grease an 8x4 inch loaf pan to prevent sticking.
Mix Wet Ingredients: In a large bowl, whisk together the pumpkin puree, brown sugar substitute, eggs, egg whites, melted and cooled butter, and vanilla extract until smooth.
Combine Dry Ingredients: Add the coconut flour, protein powder, baking powder, pumpkin pie spice, and salt to the wet mixture. Whisk everything together until just combined.
Adjust Batter Consistency: Slowly add water, a tablespoon at a time, until the batter is thick but scoopable – not runny. The amount needed can vary!
Fill and Top: Spoon the batter evenly into your prepared loaf pan. If using, sprinkle the chopped pecans over the top.
Bake to Perfection: Bake for 55 to 65 minutes, or until the bread is golden brown and feels firm when gently pressed.
Cool Down: Let the pumpkin bread cool completely in the pan before slicing and enjoying. This helps it set perfectly!