Start by making a basic vanilla ice cream mix. Combine one and a half cups of heavy cream, half a cup of sugar, one cup of milk, and one teaspoon of vanilla extract in a small pan over a medium heat. Whisk until the sugar has fully dissolved, don’t let it simmer or boil. Once cooled, divide the mixture into three bowls. Add a few drops of pink or red colouring to one bowl, and purple to another. Add the colour slowly, mixing with a fork until you have a pastel shade. Leave the third bowl white.

In your freezer, prop a giant ice cube tray on an angle (a small tub or a bag of frozen peas make a good stand!). Use a small jug to pour your vanilla mix into the molds until they are half full, one colour in each mold. Having the tray at an angle will give you the diagonal line through your ice cream squares.

Once your first color has frozen thoroughly (be sure to refrigerate your remaining vanilla mix in the meantime), lay the tray flat and pour a different color into each mold until they are all full. Let these freeze through, and them pop ’em out when you are ready to serve! To make these extra party-fied, dip the squares into a plate of sprinkles, and scatter some on top.