1/2 c. butter
Confectioners' sugar or combine mixture of 1 cup plain sugar and 3 teaspoons cinnamon. Cream butter and sugar. Blend in eggs. Dissolve yeast in water. Add to creamed mixture with sour cream. Sift together flour and salt. Add to creamed mixture alternately with milk. Cover and let rise in a warm place for 1-1 1/2 hours until double in bulk. Punch down.
Turn out on floured board. Cut in half and roll to 1/2 inch thickness. Cut with a 2 inch doughnut cutter and place on cookie sheet to rise for 10 minutes. Place in hot fat at 375 degrees. Brown both sides and lift out with slotted spoon. Divide batch and cover some in confectioners' sugar and some in cinnamon mixture.