HEAT oven to 350 degrees F.
COMBINE brown sugar, peanut butter, shortening, banana, milk, vanilla and almond extracts in bowl of electric mixer; beat at medium speed until well blended. Add egg; beat just until blended.
COMBINE flour, baking soda and salt in medium bowl. Add to shortening mixture; beat at low speed just until blended. Stir in chocolate chunks and nuts, if desired. Drop dough by rounded measuring tablespoonfuls 2 inches apart onto ungreased baking sheets.
BAKE 11 to 13 minutes or until cookies are light brown around edges. Cool 2 minutes on baking sheet; transfer to cooling racks to cool completely.