1Heat oven to 350ºF. In medium bowl, mix brown sugar, butter and egg with spoon. Stir in flour, cocoa, baking soda and salt. Pat dough in ungreased 12-inch disposable pizza pan.
2Bake pizza 10 to 12 minutes or until edge is set. Cool at least 30 minutes.
3In 2-quart saucepan, heat all Peanut Butter Sauce ingredients over medium-low heat, stirring constantly, until melted and smooth. Spread over cookie pizza. Top with peanuts and candies. Drizzle with melted chocolate chips.