Step 1: Melt Mars bars and cream

Chop 5 (50g each) Mars bars into small chunks. Place them in a heatproof bowl suspended over a pan of barely simmering water (double boiler), ensuring the water and bowl do not come into contact. Add 300ml of whipping cream (half of the total 600ml). Stir occasionally and allow to melt for approximately 25 minutes until mostly smooth.

Step 2: Cool the mixture

Once the Mars bar and cream mixture is melted, turn off the heat. Carefully remove the bowl from the saucepan and allow it to cool for 10-15 minutes until it is warm but not hot.

Step 3: Incorporate egg yolks and remaining cream

Separate 3 eggs, reserving the whites. Whisk the 3 egg yolks into the cooled Mars bar mixture. Then, whisk in the remaining 300ml of whipping cream until fully combined.

Step 4: Fold in egg whites

In a separate bowl, beat the reserved egg whites until they form stiff peaks. Gently fold the beaten egg whites into the Mars bar mixture until just combined, being careful not to deflate the whites.

Step 5: Freeze the ice cream

Pour the complete mixture into an old ice cream tub or a freezer-safe container. Place the lid on the tub and freeze for approximately 6 to 8 hours, or until firm.

Step 6: Serve

Once frozen, scoop the Mars bar ice cream into cones or bowls. Optionally, drizzle with melted chocolate and garnish with a piece of Mars bar.

• Ensure the water and the bowl do not come into contact when melting the Mars bars to prevent burning the chocolate.