Cream the sugars, butter and shortening with an electric mixer. Beat in the salt, baking powder and vanilla, scraping sides and beating until smooth. Beat in the egg, then add the flour, followed by the oats. Stir in chocolate chips and nuts.

Drop the dough by tablespoonfuls onto the prepared baking sheets. Using the flat bottom of a drinking glass dipped in sugar or the back of a spoon (which is what I used), flatten each ball of dough to about ¼-inch thick.

Bake the cookies for about 20 minutes, until they’re golden brown. These are supposed to be crunchy, so don’t underbake them. Remove them from the oven

Makes 4 dozen cookies