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1
Combine flour, sugar, baking powder, chocolate chips, and salt.
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2
In a separate bowl or large measure, combine the egg, orange juice, and vegetable oil.
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3
Stir into the dry ingredients until all ingredients are moistened.
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4
Remove half of the batter into another bowl.
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5
Stir cocoa into half of the batter, set aside.
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6
Stir orange peel into the remaining batter.
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7
Place paper liners into a 12-muffin pan.
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8
Holding pan at an angle, spoon orange batter into sides of cups.
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9
Fill other side of muffin cups with chocolate batter.
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10
(Swirl batters if desired.)
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11
Bake at 400F for 20 minutes.
