Preheat oven to 350 °F. In a small bowl, combine flour and baking soda; set aside. In a large mixing bowl, cream together butter, peanut butter and sugars until light and fluffy; beat in eggs and vanilla extract. Gradually blend in flour mixture. Stir in 1 cup (6 ounces) Nestlé chocolate morsels and oats; freeze until slightly firm but not hard. Roll dough into 1-1/2-inch balls; press down slightly on ungreased baking sheet. Roll a 1-1/4-inch ball; cut in half. Attach to first ball as ears. Repeat with remaining dough; place 2 inches apart. Bake 10 to 15 minutes or until light brown and centers are still soft. Let stand for 3 minutes; remove to wire racks to cool. Microwave remaining morsels in heavy-duty plastic bag on HIGH (100 %) power for 45 seconds; knead. Microwave at additional 10 to 20 seconds intervals, kneading until smooth. Cut tiny corner from bag; squeeze to pipe chocolate to create Mickey Mouse face. Allow chocolate to set. Store in tightly covered container.