Lately, I have been loving turning all my favourite desserts into ice creams. This ice cream has all the flavours of a key lime pie, in frozen form, and it’s kind of the best thing ever. The ice cream, soft and velvety, with it’s refreshing aromatic tartness, is perfection. A creamy, tart, citrusy heaven. The digestive biscuits bring with them a toasty crunch, which pairs extremely well with the zesty, creamy notes. It’s the kind of ice cream you can’t have just one scoop of. It’s the kind of ice cream you want to eat straight out of the tub, and finish all in one sitting.
For the ice cream base:
- 1 cup whipping cream
- 1 ½ cups milk
- ½ cup sugar
- 1 lime (juice + zest)
- 2-3 lime leaves, crushed
- 1 teaspoon cornflour
For the biscuit layer:
- ½ cup digestive biscuits, crushed
- 2 tablespoons butter, melted
For the lime curd:
- 1 egg
- 1 lime (juice + zest)
- 25 g butter
- 30 g sugar
- Add the milk, sugar and lime leaves into a saucepan and place over medium-low heat.
- Add the cornflour to a small bowl and add in a tablespoon of the milk. Mix and set aside.
- Cook the milk and sugar, stirring continuously for about 20 minutes, or until the mixture has reduced to about a cup.
- Add in the cornflour mixture and cook for an additional 2-3 minutes, or until the mixture has thickened to the consistency of condensed milk.
- Take it off the heat, remove the lime leaves. Let it come to room temperature and then place in the fridge or freezer to cool.
- Preheat the oven to 180°C.
- In another bowl, mix the crushed digestive biscuits and melted butter until well incorporated.
- Spread the biscuit mixture on a baking tray and bake for 10-15 minutes. Set aside to cool.
- For the lime curd, place the sugar, egg and lime juice in a heat-proof bowl and set over a pan with simmering water.
- Whisk continuously as you cook the mixture, until it has thickened.
- Take off the heat and add cubes of the butter and lime zest, whisk until combined. Set aside to cool.
Add the whipping cream to a large bowl and beat until stiff peaks form. Fold in the cold milk and sugar mixture, and the lime zest and juice.
- In an air-tight container, first pour a layer of the whipped cream mixture, followed by a layer of the lime curd and then a layer of the biscuits. Repeat this process, finish with a layer of biscuits. Freeze the ice cream for at least 6 hours or overnight.