Preheat oven to 350ºF. Grease and flour a 10-inch Bundt pan.
Combine cake mix, pudding mix, eggs, 1 cup of orange juice, olive oil and orange zest in large bowl.
Beat with an electric mixer at medium speed for 2 minutes, scraping bowl often. Pour into prepared pan and bake for 45 minutes or until a toothpick inserted in the center comes out clean.
Let the cake cool on a wire rack for about 10 minutes, then turn from pan.
Combine sugar and remaining ¼ cup orange juice in small saucepan; simmer 2 to 3 minutes or until sugar is dissolved. Brush over warm cake.