Toast the muffins lightly without Crabbie mix on top first. Mix all the other ingredients together in a bowl. Put a dollop of the Crabbie mix on a muffin half and place them on a cookie sheet. Place into a 350 degree oven for about 15-20 minutes or until golden brown.
This recipe affectionately became known as "crab sh*t on a muffin" by the rowing folks. However, even with the unfortunate nickname, they are incredibly tasty.