Peanut Butter Tart Squares - Karo

Ingredients

• 1/4 cup butter OR margarine
• 1/4 cup creamy peanut butter
• 1/3 cup brown sugar
• 3/4 cup all-purpose flour
• 1/4 cup corn starch
• 1/4 teaspoon salt
• 1/2 cup Karo ® Light Corn Syrup
• 2 tablespoons corn starch
• 1/4 teaspoon baking powder
• 1/8 teaspoon salt
• 2 tablespoons butter OR margarine softened
• 2 egg beaten
• 1 teaspoon pure vanilla extract
• 1/2 cup chopped unsalted roasted peanuts
• 1/2 cup peanut butter chips
• 1/2 cup semi--sweet OR dark chocolate chips