Orange Cake

Directions

1. 1
   Preheat oven to 350F.
2. 2
   Lightly butter an 8-inch square baking pan and line bottom with wax paper, then lightly butter paper.
3. 3
   Beat together butter, sugar, and zest in a large bowl with an electric mixer until creamy, about 2 minutes.
4. 4
   Add eggs 1 at a time, beating until just incorporated.
5. 5
   Whisk in sour cream and orange juice, then add remaining ingredients (except confectioners sugar), whisking until just combined.
6. 6
   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.
7. 7
   Cool cake in pan on a rack 10 minutes, then turn out onto rack.
8. 8
   Discard paper and cool.
9. 9
   Dust with confectioners sugar.