Nonstick
vegetable oil spray
1 cup walnuts
(about 4 ounces)
1 tablespoon
coarsely chopped orange zest
3/4 cup
all-purpose flour
1/2 cup
unsweetened cocoa powder
1 teaspoon
baking powder
2 large eggs,
room temperature
2 large egg
whites, room temperature
1 cup sugar
3/4 cup light
olive oil
1/4 cup fresh
orange juice
1 teaspoon
vanilla extract
2 tablespoons
confectioner's sugar
Position rack
in center of oven and preheat to 350 degrees F. Spray a
10-inch-diameter springform
pan with nonstick vegetable oil spray. Lightly
dust pan with flour, tapping
out excess.
Finely chop
walnuts and orange zest in processor using on/off turns.
Combine flour,
cocoa, baking powder, and salt in large bowl. Stir in
walnut mixture.
Using electric
mixer beat eggs and egg whites in another large bowl until
frothy. Gradually
add 1 cup sugar and beat until mixture is pale yellow and
thick and slowly
dissolving ribbon forms when beaters are lifted, about 5
minutes. Slowly
beat in olive oil on low speed. Beat in orange juice and
vanilla. Gently
fold egg mixture into flour mixture until thoroughly blended.
Pour batter
into prepared pan. Bake until edges of cake begin to pull away
from sides of
pan and center is firm to touch, about 35 minutes. Cool cake
completely in
pan on rack. Loosen sides of cake from pan with small knife.
Remove rim of
pan and transfer cake to serving platter. Sift confectioner's
sugar over top
of cake. Serve in small wedges. Serves 16.