Grandma'S Cinnamon Rolls - cooking recipe

Ingredients

2 c. mashed potatoes
1/2 c. potato water (save from cooking the peeled potatoes)
3 c. sugar, divided
1/2 oz. active dry yeast (2 packets)
1 1/2 c. lukewarm water
4 eggs
3 sticks butter, divided (3/4 lb.)
1/2 c. shortening
1/4 tsp. salt
10 c. flour or more!
2 tsp. cinnamon

Preparation

The night before, dissolve the yeast in the warm water. Add 1 cup sugar and the potato water to the mashed potatoes and mix. When the yeast water is cold, add it to the potato mixture and let it set overnight.