Step 1

Preheat the oven to 160°C. Place half the biscuits upside down on a baking tray. Cut each marshmallow if half, then press four halves onto each biscuit. Bake for two minutes, or until the marshmallow is soft and slightly melted. Remove from the oven and set aside for one minute.

Step 2

Spread the jam over the base of the remaining biscuits. Sandwich together each jam biscuit with a marshmallow biscuit, squeezing gently to ensure they stick. Allow to set for 15 minutes, or until the marshmallow has completely cooled.

Step 3

Melt the chocolate in a heatproof bowl set over a saucepan of just-simmering water. Watch it carefully, stirring frequently, to ensure it doesn't burn. Once melted, stir through the oil.

Step 4

Line up your biscuits, chocolate and a baking tray lined with baking paper. Using two forks, dip each biscuit into the chocolate, ensuring it is completely covered. Place the biscuit on the baking sheet to set, then either use a metal spatula to smooth the tops or leave them as are. Allow the biscuits to set completely.