Citrus Bars

I have a lot of oranges because they are in season, so I decided to make these buttery bars that taste like sunshine. If you like lemon bars, you'll love these. The orange juice gives them a sweeter flavor.

Citrus Bars
1 cup butter, softened
2 1/4 cups all-purpose flour, divided
1/2 cup powdered sugar
1 3/4 cups granulated sugar
Juice from 2 lemons
1 tsp. orange zest
Juice from 3 oranges
4 eggs, lightly beaten
1 tsp. baking powder
1/4 tsp. salt

1. Beat butter at medium speed with an electric mixer until creamy; add 2 cups flour and powdered sugar. Beat until mixture forms a smooth dough. Press mixture into a lightly greased 13- x 9-inch baking pan. (I lined mine with parchment paper and then sprayed it with cooking spray. This allows me to lift out the bars and cut them into individual servings on the cutting board.)
2. Bake at 350° for 29 minutes or until lightly browned.
3. Meanwhile, whisk together remaining 1/4 cup flour, granulated sugar, and remaining ingredients; pour over baked crust.
4. Bake at 350° for 30 minutes or until set.