Tamarind millionaire's shortbread

Base

• 125 g unsalted butter, cut into pieces
• 75 g coconut sugar or brown sugar
• 50 g desiccated coconut
• 185 g plain flour

Tamarind caramel

• 15 g unsalted butter
• 20 g coconut sugar or brown sugar
• 2 tbsp tamarind paste
• 395 g condensed milk

Topping

• 200 g dark chocolate (70% cocoa), broken into pieces
• 50 g butter