Preheat oven to 160˚C and prepare a 8” square tin

Add the butter and sugary premix to a bowl and melt it over a pan of gently simmering water.

Remove it from the heat and whisk in the eggs one at a time until smooth.

Sift in the flour and fold it through with a spatula.

Pour the mixture into the tin and bake for 35-40 minutes. A skewer should still be slightly wet when you poke it in. *Baking times may vary

Let the brownies cool slightly in the tin then lift them out of the tin and then chill them in the fridge for a few hours. Trim off the edges with a hot knife then serve them at room temperature