S'mores cupcakes

Biscuit base

• 130 g digestive biscuits
• 70 g unsalted butter, cut into pieces

Chocolate cupcakes

• 80 g raw sugar
• 150 g plain flour
• 20 g Dutch cocoa powder
• ½ tsp baking powder
• 1 tsp bicarbonate of soda
• 1 pinch sea salt
• 2 eggs
• 80 g buttermilk
• 50 g vegetable oil
• 1 tsp natural vanilla extract
• 50 g boiling water
• 120 g dark chocolate chips

Chocolate sauce

• 80 g dark chocolate chips
• 50 g full cream milk
• 10 g unsalted butter
• ¼ tsp natural vanilla extract

Marshmallow frosting

• 100 g white sugar
• ¼ tsp cream of tartar
• 30 g water
• 2 egg whites