3 williams sonoma mashed Recipes

unsalted butter (softened ), sugar, very ripe bananas, mashed (1-1/2 cups measured), eggs, lightly beaten, buttermilk (you can substitute homemade by letting milk plus tbsp vinegar set for 10 minutes), all-purpose flour, baking soda, baking powder, fresh nutmeg (or 1/2 tsp. dried- i use about 1/2 fresh ) (optional), salt, coarsely chopped walnuts

yukon gold potatoes, unpeeled and preferably organic , scrubbed, unsalted butter, leeks, white and light green portions finely chopped and rinsed well, sour cream, at room temperature, milk, heated to a simmer, salt, plus more , to taste, fresh ground pepper, plus more , to taste