Preheat oven to 400°. Line muffin pan with 12 paper cups. Combine bran and buttermilk. Mix together flour, cinnamon, baking soda, salt and baking powder. Add all at once to bran mixture, stirring just to mix. Cream butter, brown sugar, egg and molasses thoroughly. Blend into bran mixture. Stir in raisins and dates. Fill muffin cups 3/4 full. Bake 20 to 25 minutes. Cool slightly. Remove paper cups from muffins.

In a small saucepan, combine honey, corn syrup and butter. Bring to a boil over medium heat. Reduce heat and simmer 5 minutes. Place muffins, one at a time, in glaze. Use spoon to coat thoroughly. Place on cookie sheet until glaze is set, about 3 to 5 hours.