Millionaire's shortbread

Other

Turn on oven to 160C/325F

Place a layer of baking paper into a 9-inch square baking tin with some overhang to allow you to lift it out later

Cream butter and sugar together until sugar is just dissolved.

Add flour (and salt if using) and mix together to form clumps, using fingertips if necessary

Tip into the baking tin and press out evenly

Bake for 25-30 minutes until lightly golden

Remove and allow to cool

Melt butter and sugar together in a saucepan over a medium heat

Add the two tins of condensed milk

Bring to the boil, stirring constantly and allow to boil for 1-2 minutes

Turn down to a simmer and continue to stir for 10-15 minutes until the mixture has thickened and darkened

Tip over the shortbread layer, using the back of a spoon to make the mixture smooth, or shake the tin from side to side

Allow to cool and set