In a large bowl cream butter and sugar until the mixture is fluffy. Add in vanilla and egg and mix well. Add salt, flour, and baking soda. Mix well. Stir in the crisp rice cereal and butterscotch chips. Step 2: Drop dough by the rounded teaspoon onto a greased cookie sheet.
Bake in the oven at 350 degrees for 12-15 minutes. Remove from oven and let cool.