Blueberry Sour Cream Cake
["1/2 c. butter, softened", "1/2 c. sugar", "1 egg", "1 1/2 c. flour", "1 1/2 tsp. baking powder", "1 tsp. vanilla", "4 c. fresh blueberries", "2 (8 oz.) cartons sour cream", "2 egg yolks", "1/2 c. sugar", "1 tsp. vanilla", "1 1/2 c. whipping cream", "1/4 c. sifted 10x sugar", "fresh blueberries for garnish"]
["Cream butter, sugar and 1 egg, beating well.", "Combine flour and baking powder and add to creamed mixture.", "Mix until blended. Add vanilla.", "Spread into greased 9-inch spring-form pan. Sprinkle with 4 cups blueberries."]
["butter", "sugar", "egg", "flour", "baking powder", "vanilla", "fresh blueberries", "sour cream", "egg yolks", "sugar", "vanilla", "whipping cream", "sugar", "fresh blueberries"]