|3/4||cup sour cream|
|1/2||cup butter, softened|
|1 1/2||cups all-purpose flour|
|2||tablespoons orange juice|
|1/2||teaspoon baking soda|
|3||cups powdered sugar|
|1/3||cup butter, softened|
|2||to 3 tablespoons orange juice|
|1||tablespoon freshly grated orange peel, if desired|
Heat oven to 375°F. Combine sugar, sour cream and 1/2 cup butter in large bowl. Beat at medium speed, scraping bowl often, until creamy. Add all remaining bar ingredients; continue beating until well mixed.
Spread batter into greased 13x9-inch baking pan. Bake for 17 to 22 minutes or until toothpick inserted in center comes out clean. Cool completely.
Meanwhile, combine powdered sugar and 1/3 cup butter in large bowl. Beat at medium speed, scraping bowl often, until creamy. Continue beating, gradually adding enough orange juice for desired frosting consistency.
Spread frosting over cooled bars. Sprinkle with orange peel, if desired. Cut into bars.