Preheat oven to 160 degrees Fan

Butter and line a 10" x 10"/25cm x 25cm cake tin

In a saucepan melt the butter, chocolate pieces and golden syrup

Crack the eggs into a bowl and add the sugar

Whisk the eggs and sugar until light and fluffy.  The longer you whisk the thicker and fluffier the mixture will become which is good

Add the melted chocolate and fold into the sugar and butter mixture

Sift into the bowl the flour and cocoa powder

Add a pinch of sea salt

Melt the peanut butter in the microwave until thin enough to drizzle

Pour half of the mixture into the prepared pan

Drizzle the peanut butter over the chocolate mixture 

Top with the rest of the brownie mixture

Place pieces of the peanut butter cups randomly on top of the brownies

Bake in the pre-heated oven for 30-35 minutes

Cool completely in the tin then cut into squares