Heat the oven to 375 degrees F and line a 12 cup muffin pan with paper liners.
In a large bowl whisk together the flour, sugar, baking powder, baking, and salt.
In a separate bowl combine the orange zest, butter, vanilla, orange juice, sour cream, and eggs.
Add the wet ingredients into the dry and stir until most of the dry ingredients are moist. Add the chocolate chips and fold to incorporate.
Scoop the batter into the prepared muffin pan and top with a few extra chocolate chips, if desired. Bake for 18 to 20 minutes or until the center of the muffins springs back when lightly pressed and the tops are golden brown. Cool in the pan for 3 minutes then transfer to a wire rack to cool completely.
by The Savvy Kitchen