Lemon Marshmallow Slice

Prep: 30 mins
Cook: 30 mins
Servings: 20
Lemon Marshmallow Slice

Lemon Marshmallow slice is always a hit with the kids with its delicious three tiers: spongey top, zesty sweet filling and crumble base.



Lemon Filling:

  • 1 cup CSR White Sugar
  • 1 cup water
  • 2 lemons, juice and rind
  • 1/2 cup milk
  • 2 tbsp custard powder
  • 2 tbsp White Wings cornflour


  • 2 tbsp gelatine
  • 1 cup boiling water
  • 1 cup CSR White Sugar
  • 1 tsp lemon essence
  • 1 cup CSR Soft Icing Mix


  1. To prepare the shortcrust base, cream butter and sugar with electric mixer. Add egg, flour, and vanilla essence. Mix well then press into a well-greased slice or sponge-roll tray.
  2. Bake for 15-20 mins at 160°C until pale golden coloured. Allow to cool.
  3. For the filling, combine sugar, water and the juice and rind of the lemons in a saucepan and bring to the boil.
  4. In a separate bowl, mix the milk, custard powder and cornflour to form a smooth paste. Stir in the 2 mixtures together using a wire whisk, then slowly bring to the boil and heat for 3 mins. Pour over the shortcake.
  5. To make the marshmallow, dissolve gelatine in water in a medium-large saucepan. Add the sugar and boil for 8 mins, then cool.
  6. Add the lemon essence and icing sugar, beating until thick and creamy. Pour at once over the shortcake and filling and leave to set.