Combine first four ingredients; set aside. In a mixing bowl, cream butter and honey; add eggs (one at a time) until well blended. Gradually stir in next three ingredients; mix well. Slowly add buttermilk. Spoon 2 tablespoons batter into oiled muffin cups; add 1 teaspoon orange filling and fill 2/3 full with batter. Bake in preheated oven at 400 F. for 20-25 minutes.