‘Not Nanaimo Bar’ Squares

Growing up for some reason we referred to these as ‘Oh Henry Squares’. I’ve no idea why, but I have not served them without people requesting the recipe and rave reviews. I don’t know the origin. It’s just been passed on through my family.

Original recipe makes 20 bars


1/2 cup peanut butter
1/2 cup brown sugar
1/2 cup corn syrup
2 cups cornflakes cereal
1 cup crispy rice cereal (such as Rice Krispies®)
2 cups confectioners’ sugar
2 tablespoons custard powder
1/2 cup margarine, melted
1 tablespoon warm water, or as needed
4 (1 ounce) squares semisweet chocolate, chopped
2 tablespoons margarine

  • PREP

    15 mins

  • COOK

    5 mins


    50 mins


  1. Grease an 8×8-inch square pan.
  2. Cook and stir peanut butter, brown sugar, and corn syrup together in a large pot over medium heat just until warm and well blended, about 3 minutes; remove from heat. Stir cornflakes cereal and crispy rice cereal into peanut butter mixture; press cereal mixture evenly into the prepared pan.
  3. Whisk confectioners’ sugar and custard powder together in a bowl. Whisk 1/2 cup melted margarine gradually into custard mixture. Stir warm water into custard mixture to moisten to a spreadable consistency; spread evenly over cereal mixture.
  4. Melt chocolate with remaining 2 tablespoons margarine in a microwave-safe bowl, about 1 minute. Pour chocolate mixture over custard layer. Refrigerate cookies until chocolate is hardened, about 30 minutes; cut into 1-inch squares.


Calories: 219 kcal
Carbohydrates: 31.3 g
Cholesterol: 0 mg
Fat: 10.6 g
Fiber: 0.9 g
Protein: 2.4 g
Sodium: 132 mg