orange streusel coffee cake

Ingredients

• 2 cups flour
• 1/2 cup sugar
• 1/2 teaspoon baking powder
• 1/2 teaspoon salt
• 1 - rind of orange, grated
• 1 - egg, slightly beaten
• 1/2 cup milk
• 1/2 cup orange juice
• 1/3 cup oil
• 1/4 cup flour
• 1/4 cup sugar
• 2 tablespoons grated orange rind
• 2 tablespoons butter