Rub in the butter to create a mixture that resembles breadcrumbs.

Place flour in a bowl, add butter and rub until the mixture resembles breadcrumbs.

Rub in using your fingertips until it resembles breadcrumbs, then stir through the sugar.

Pulse the mixture a few times until it resembles breadcrumbs.

Place the flour in a bowl, rub in the butter until it resembles breadcrumbs.

Rub in the cold butter until the mixture resembles breadcrumbs.

Rub the butter into the flour until it resembles breadcrumbs.

Rub in the butter until the mixture resembles breadcrumbs.

Add the chilled butter, rubbing it into the dry ingredients using your fingertips until the mixture resembles breadcrumbs.

For the pastry put the butter, flour and sugar into a food processor and blitz until it resembles breadcrumbs.

Place the rehydrated prawns and chillies into a food processor with the prosciutto and blitz until the mixture resembles breadcrumbs.

To make the pastry by hand, use a large mixing bowl to rub together the flour, butter and sugar until the mixture resembles breadcrumbs.

Sift the flour and salt into a bowl, add the icing sugar, then rub in the butter with your fingertips until the mixture resembles breadcrumbs.