Preheat oven to 350°F. Spray 8- or 9-inch square baking pan with cooking spray.
Mix butter, brown sugar, corn syrup, vanilla, and salt with electric mixer until smooth. Stir in oats. Press into prepared pan.
Bake for 15 to 18 minutes or until center is barely firm. Cool onwire rack 5 minutes.
Sprinkle with chocolate chips; top with small spoonfuls of peanut butter. Let stand 5 minutes; spread peanut butter and chocolate over bars, swirling to marbleize.
Cool completely on wire rack. Refrigerate 15 minutes to set topping. Cut into bars.
About Corn Syrup
See why there’s no substituting Karo® Corn Syrups for treats with a delicate sweetness and smooth texture
Preheat oven to 350°F. Spray 8- or 9-inch square baking pan with cooking spray.
Mix butter, brown sugar, corn syrup, vanilla, and salt with electric mixer until smooth. Stir in oats. Press into prepared pan.
Bake for 15 to 18 minutes or until center is barely firm. Cool onwire rack 5 minutes.
Sprinkle with chocolate chips; top with small spoonfuls of peanut butter. Let stand 5 minutes; spread peanut butter and chocolate over bars, swirling to marbleize.
Cool completely on wire rack. Refrigerate 15 minutes to set topping. Cut into bars.