This is what I came up with for my traditional Irish recipes which called for mixed spice after posting a question in the 'Zaar forums. It works for me, and my baked goods come out tasty.
Ingredients:
1 tablespoon cinnamon
1 tablespoon nutmeg
1 tablespoon allspice
2 teaspoons mace
1 teaspoon ground cloves
Directions:
1. Mix all ingredients together. 2. Store in airtight glass jar.