Adding mashed potato or sweet potato to bread dough results in a softer, moister crumb and extends the bread's shelf life due to the starches retaining moisture. The bread will also have a slightly sweeter flavor.
Incorporating mashed potato or sweet potato into bread dough significantly alters its texture and characteristics. Here's a breakdown of the key effects:
Softer Crumb: The starches in potatoes and sweet potatoes gelatinize during baking, absorbing and holding onto water. This increased moisture content leads to a softer, more tender crumb structure in the finished bread.
Enhanced Moisture Retention: The starches also retrogradate slowly, meaning they release moisture at a slower rate compared to wheat flour alone. This results in bread that stays moist and fresh for a longer period, extending its shelf life.
Subtle Sweetness: Sweet potatoes, in particular, contribute a natural sweetness to the bread. Even regular potatoes can impart a subtle sweetness due to the conversion of starches into sugars during the baking process.
Improved Dough Handling: The added starch can also improve the dough's handling properties, making it slightly more elastic and easier to work with. However, adding too much can make the dough sticky.
Nutritional Boost: Potatoes and sweet potatoes add vitamins and minerals to the bread, increasing its nutritional value.
When adding mashed potato or sweet potato, start with a small amount (around 10-20% of the flour weight) and adjust to taste. Overdoing it can lead to a gummy texture. Also, ensure the potatoes are completely cool before adding them to the dough to avoid affecting the yeast activity.