These bar cookies will remind you of an old-fashioned spice cake complete with walnuts and a yummy cream cheese frosting.
1. Heat oven to 350 F. Coat a 15 x 10-inch jelly-roll pan with cooking spray. Line with parchment or waxed paper; coat paper with spray.
2. Combine flour, baking powder, cinnamon, nutmeg, salt and pepper in medium-size bowl. Beat butter and sugar at medium speed in large bowl until combined, about 3 minutes. Beat in eggs and vanilla.
3. On low speed, beat in flour mixture alternately with sour cream, ending with flour. Fold in walnuts. Spread in prepared pan.
4. Bake at 350 F for 30 minutes or until center is set. Let cool in pan on wire rack. Turn out onto wooden board; remove paper. Turn upside down onto serving platter. Spread with frosting, cut into 2 x 2-1/2-inch bars and serve, topped with flavored walnuts.