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weetbix slice
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4.56 from 9 votes

Weetbix Slice

An oldie but a goodie. You can't beat this classic Weetbix Slice, covered in chocolate icing.
Prep Time15 mins
Cook Time20 mins
Total Time35 mins
Course: Dessert
Cuisine: Australian
Keyword: weetbix slice
Servings: 24 pieces
Calories: 120kcal


  • 3 weetbix (or 55 grams of another similar wheat-based cereal)
  • 1/2 cup brown sugar
  • 1 cup SR flour
  • 1 cup desiccated coconut
  • 1 teaspoon cocoa
  • 125 grams butter


  • 1 1/2 cups icing sugar
  • 1 tablespoon cocoa
  • 1 tablespoon butter (15 grams)
  • 1-2 tablespoon boiling water


  • Pre-heat oven to moderate (I use 170 degrees celsius, fan-forced).
  • Grease a slice tin (approx 26 x 16 cm) and line with baking paper, leaving excess on the sides to lift out slice once cooked.
  • Crush weetbix into a bowl.
  • Add remaining dry ingredients to bowl and stir to combine.
  • Melt butter and add to dry ingredients. Mix well.
  • Press mixture into slice tin with hands and even the top surface using the back of a spoon.
  • Cook for 20 minutes.
  • Start preparing the icing a few minutes before the slice is ready to be removed from the oven. This slice is iced while hot from the oven.


  • Sift icing sugar and cocoa into a bowl.
  • Add 1 tablespoon of the boiling water to the butter and allow butter to melt.
  • Add melted butter mixture to icing sugar and mix well.
  • Add a little extra boiling water if necessary so the icing is soft enough to spread. Spread the icing over the slice while still hot.
  • Allow to cool completely before lifting from the tin using the baking paper and slicing into 24 pieces.

Airfryer Method

  • Using the 3.2L Kmart Air Fryer (or equivalent), use a circle of baking paper to line the basket so the paper reaches about one third to half way up the side of the basket.
    air fryer method for weetbix slice
  • Make the slice base according to the instructions above and pour mixture into air fryer basket.
  • Press down with your hands to make the base even and firm.
    air fryer method for weetbix slice
  • Smooth out the base further using the back of a spoon.
    weetbix slice in air fryer
  • Cook in the air fryer at 155 degrees celsius for 20 minutes.
    air fryer method for weetbix slice
  • Make up icing according to instructions above a few minutes before the base finishes cooking.
  • Once base is cooked, remove basket and pour icing over base while still hot.
    pouring icing over hot base
  • Place basket on bench so that it can cool evenly.
    allow icing to cool
  • Allow to cool completely before lifting slice from basket, lifting gently around the sides until it comes out of the basket in one piece.
  • Cut slice into pieces.
    weetbix slice made in an air fryer



Calories: 120kcal | Carbohydrates: 17g | Protein: 1g | Fat: 6g | Saturated Fat: 4g | Cholesterol: 12mg | Sodium: 44mg | Potassium: 27mg | Fiber: 1g | Sugar: 12g | Vitamin A: 145IU | Vitamin C: 1mg | Calcium: 6mg | Iron: 1mg