Cut whole, unpeeled orange into 8 sections and chop in a food processor. Add the chopped oranges to the dates, nuts, melted butter, orange juice, sugar, and egg.
Sift the dry ingredients together and then stir into the wet ingredients until just blended. Pour into paper-cup lined mini-muffin tins, filling them 3/4 full. Bake for 25 to 30 minutes, until puffed and firm in the center. Cool before serving.