Active Time

　　15 minutes

　　Total Time

　　1 1/2 hours

　　

Ingredients

Makes 8 servings

　　1 stick (1/2 cup) unsalted butter, softened

　　3/4 cup sugar

　　4 teaspoons finely grated fresh orange zest

　　2 large eggs

　　1/2 cup sour cream

　　1/4 cup fresh orange juice

　　1 1/2 cups all-purpose flour

　　1 teaspoon baking powder

　　1/2 teaspoon salt

　　1/2 teaspoon baking soda

　　Confectioners sugar for dusting

　　

Step 1

Preheat oven to 350°F. Lightly butter an 8-inch square baking pan and line bottom with wax paper, then lightly butter paper.

　　

Step 2

Beat together butter, sugar, and zest in a large bowl with an electric mixer until creamy, about 2 minutes. Add eggs 1 at a time, beating until just incorporated. Whisk in sour cream and orange juice, then add remaining ingredients (except confectioners sugar), whisking until just combined.

　　

Step 3

Transfer batter to baking pan and bake in middle of oven until golden and a wooden pick inserted in center comes out clean, about 30 to 40 minutes.

　　

Step 4

Cool cake in pan on a rack 10 minutes, then turn out onto rack. Discard paper and cool. Dust with confectioners sugar.