Get out 2 small bowls to prepare the peanut butter and chocolate drizzle. In one bowl, add the peanut butter and microwave ~30 seconds or until melted. In the other bowl, combine the baking cocoa with a little water at a time until mixture is liquid in consistency and easy to drizzle. Drizzle peanut butter and chocolate mixture on top of cheesecake once cool. Let chill in refrigerator for a few hours or overnight before serving.