1. CREAM together butter and sugars until light and fluffy. Whisk in egg and vanilla. Sift together the flour and CADBURY BOURNVILLE Cocoa Powder then stir into butter mixture. Add the CADBURY White Baking Chips and mix through.
2. PLACE tablespoonsful of the cookie mixture onto greased baking trays. Press the mixture down lightly using a spatula or back of spoon to flatten slightly.
3. BAKE in a moderately slow oven 160°C for 12-15 minutes or until cooked. Cool on a wire rack.