In a food processor, add bananas, lemon juice, cream and sugar. Mix it well until a smooth mixture is not formed.
Keep your ice cream bowl in the freezer until it is ready to use and then take it out and place it in the ice cream maker.
Put this banana mix in the frozen bowl and add the walnuts, chocolate chunks, and ½ brownie bits.
Freeze this mix according to the manufacturer’s direction. Stir the remaining brownie bits at the end of it.
Now, remove your ice cream from the bowl and put it into a container you can place in the freezer. Freeze it for about more than 2 hours and serve chilled!