the ones you mention are iced with a royal icing that drys hard. I am going to give you another recipe that I like better- you can choose if you want to try them.
Iced Molasses Raisen Cookies
3 1/4 c flour
1 tsp baking soda
1/4 tsp salt
2 tsp cinnamon
1 tsp ginger
1/2 tsp allspice
-wisk the above together in a bowl, set aside
1 c dark brown sugar
1 c softened butter
3/4 c moleasses (light or dark is your preferance)
1 egg
-beat the above in order given till fluffy. Blend in the flour mixture-but to not over beat.
1 1/2 c raisens
-stir into the dough. Shape dough into 2 inch wide logs12 inches long, wrap in wax paper and chill several hours (or freeze for later use) . Slice 1/2 inch -bake 20-22 min at 300. Makes about 50.
Icing
1 c powdred sugar
2 Tbl milk
-drizzle over cookies
Hope you like them, they have a nice old fashioned flavor,
Kallee