1. Heat oven to 325°F. Lightly grease cookie sheet or line with parchment paper.
2. Beat butter and sugar in large bowl until blended. Add eggs and vanilla; beat well. Stir together flour, baking powder and salt; gradually add to butter mixture, beating until smooth. (Dough will be stiff.) Using spoon or with hands, work 1 cup cinnamon chips and walnuts into dough.
3. Divide dough into four equal parts. Shape each part into a log about 8 inches long. Place on prepared cookie sheet, at least 2 inches apart; flatten slightly.
4. Bake 25 to 30 minutes or until logs are set and wooden pick inserted in center comes out clean. Remove from oven; let cool on cookie sheet 30 minutes. Transfer to cutting board. Using serrated knife and sawing motion, cut logs diagonally into 1/2-inch wide slices. Place slices close together, cut side down on ungreased cookie sheet. Return to oven; bake 5 to 6 minutes. Turn each slice; bake an additional 5 to 8 minutes. Remove from oven; cool slightly. Remove from cookie sheet to wire rack. Cool completely. Melt remaining cinnamon chips with shortening; drizzle over each cookie. Drizzle White Chip Drizzle over top.
WHITE CHIP DRIZZLE: Place 1/4 cup HERSHEY'S Premier White Chips and 1 teaspoon shortening (do not use butter, margarine, spread or oil) in small microwave-safe bowl. Microwave at MEDIUM (50%) 30 to 45 seconds or until smooth when stirred.
Makes about 5 dozen cookies.