Maple Pecan Pound Cake
["3 c. flour", "1/4 to 1/2 tsp. soda", "3 c. sugar", "6 eggs, separated", "1 c. butter", "1 c. sour cream", "2 tsp. maple flavoring", "1 c. chopped pecans"]
["Sift flour and soda three times.", "Separate yolks and whites of eggs.", "Cream butter and sugar well.", "Add egg yolks, one at a time, and beat well.", "Add flour and sour cream alternately, beginning and ending with flour.", "Add flavoring and nuts.", "Fold in stiffly beaten egg whites."]
["flour", "soda", "sugar", "eggs", "butter", "sour cream", "maple flavoring", "pecans"]