You can use chocolate chips instead of butterscotch chips. For a half batch, use an 8 inch square pan and cut all the ingredients in half. For the egg, that means using 2 tablespoons lightly beaten. The time should be reduced to about 18 to 20 minutes. To toast the nuts, just lay them on a baking sheet and bake at 350F for about 6 to 8 minutes or until aromatic.