3 sweet potato doughnuts butter Recipes

sugar, melted butter, cold mashed potatoes (these need to be plain without butter, milk etc.), eggs, beaten, flour , sifted, baking powder (i know, it s a lot), salt, nutmeg, cocoa, buttermilk or 1/2 cup sweet milk

unsalted butter, whole milk, active dry yeast, water, warm, granulated sugar, granulated sugar, sweet potato puree (from 1 small cooked sweet potato), egg, egg yolk, pure vanilla extract, coarse salt, cinnamon, ground, all-purpose flour, plus more for surface and sheets, high oleic safflower oil, for deep-frying and bowl, unsalted butter , cut into pieces, sugar , sifted, whole milk