Step 1

Preheat oven to 350°F. Line 12-inch pizza pan with aluminum foil; spray with cooking spray. Place 1/2 cup butter and the unsweetened chocolate in heavy 3-qt. saucepan; cook on very low heat just until chocolate is melted, stirring constantly. Cool. Stir in 1-1/2 cups of the sugar. Add eggs, 1 at a time, stirring until well blended after each addition. Stir in milk and vanilla. Add flour and salt; mix well. Spread evenly into prepared pan.

Step 2

Bake 25 to 30 min. or until toothpick inserted in center comes out clean; cool completely.

Step 3

Beat cream cheese, peanut butter and the remaining 1/4 cup sugar with electric mixer on medium speed until well blended. Spread onto crust. Arrange banana slices over cream cheese mixture; sprinkle with peanuts. Place semi-sweet chocolate and the 2 tsp. butter in heavy saucepan; cook on very low heat just until chocolate is melted and mixture is well blended, stirring constantly. Drizzle over pizza.