Ingredients
1/4 cup butter, softened1/2 cup sugar1 large egg1/4 teaspoon grated orange zest1/4 teaspoon vanilla extract3/4 cup all-purpose flour1/4 teaspoon baking powder1/4 teaspoon cream of tartar1/8 teaspoon baking soda1/8 teaspoon salt1/4 cup sour cream2/3 cup finely chopped fresh rhubarb1/4 cup chopped walnuts
Preparation
In a large bowl, cream butter and sugar until light and fluffy. Beat in the egg, orange zest and vanilla. Combine the flour, baking powder, cream of tartar, baking soda and salt; add to creamed mixture alternately with sour cream. Fold in rhubarb and walnuts.
Transfer to two 5-3/4x3x2-in. loaf pans coated with cooking spray. Bake at 350° for 40-45 minutes or until a toothpick inserted in the center comes out clean. Cool for 10 minutes before removing from pans to wire racks.
