On Mother's Day I found myself without a prepped starter or poolish. There were some leftover mashed potatos in the fridge, so I hit the cookbooks and found a recipe that fit the bill in Bernard Clayton's New Complete Book of Breads.
This made wonderfully soft, sweet rolls. They weren't as rich as brioche, but they certainly tasted much richer than what I normally bake. The crumb was even and very soft, soft enough that my 2 year old was petting it.
Soft! "Purr purr"
Sister Jennie's Potato Bread
Makes 1 dozen rolls
1 cup mashed potatoes
1/2 cup sugar
1 teaspoon salt
1/2 cup warm water
1/2 cup (1 stick) melted butter
2 teaspoons instant yeast
4 - 5 cups all-purpose flour
I combined everything and then let it rise until it had approximately doubled in size (90 minutes).
I scaled the rolls to between 4 and 5 ounces, which was on the large size (almost hamburger bun sized). There is enough sugar in them that they need to baked at a fairly low temperature and on a higher shelf than usual unless you want burned bottoms. I believe I baked them for around 20 minutes at 375.